LG 42LP1D Dimensions

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LCD VS. PLASMA: WHICH IS RIGHT FOR YOU?
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more than the price of an EDTV
just over a year ago. LG Electronics
is one of the only companies with
their feet on both sides of this issue
(the other biggie being their across-
the-Han rival, Samsung). LG also
makes an LCD in a 42-inch size,
which is rather rare. Most are either
smaller or slightly larger. There are
lots of questions and misinforma-
tion about these technologies, so
hopefully we can clear a lot of that
up. This isn’t a true head-to-head
Face Off; let me tell you why.
LCD and plasma go head to head…sort of.
The 42-inch display size has
become a battleground of sorts
between liquid crystal displays
(LCDs) and plasma displays. Ironi-
cally, the older technology, LCD, is
the relative newcomer here. Prices
on both sides have dropped quickly.
You can now buy an HDTV (quali-
fied by both resolution and the inte-
gration of a tuner) for just a little
It’s (Almost) All in the
Black Level
Of all of the video Face Offs we’ve
done over the last few years, the
winners had one thing in common:
black level. They either had the best
black level or were tied with
another display for the best black
level. So, in a Face Off between an
LCD and a plasma, it’s pretty safe
to say that the plasma would win.
Even the LCD panels with the deep-
est black levels are still noticeably
higher than the black levels that
plasmas can produce. So, if that’s
what you’re looking for, look no
further. Rarely, though, is black
level the whole story.
What and Where
The most important question you
have to ask yourself before you
start looking for a display is how
you’re going to use it. If you
answered “To watch TV, stupid!”
roll up this magazine and hit your-
self with it. We only need one
smart ass here, and it’s obviously
me. How you use your display is
crucial to which flat-panel tech-
nology you should consider.
For example, say you’re looking
to replace the TV in your family
room with something sexy and
flat. A poster of the cast of Lost is
probably out, so you have your
eyes set on a flat panel. Most
LG Electronics 42LP1D LCD HDTV
and 42PX4D Plasma HDTV
Photography by Cordero Studios / Screen image courtesy of Universal
BY GEOFFREY MORRISON
LG’s 42LP1D LCD
is a good display choice
for use in a room with
lots of light.
^
Home Theater / August 2005 >www.hometheatermag.com

family rooms are pretty brightly
lit, either by fashionable lighting
from your local Ikea or by big
widows and doors. If this is the
case, and you intend to watch TV
during the day, plasma isn’t the
best choice. There are several rea-
sons for this, the first being reflec-
tions. The front of a plasma is
glass…reflective, shiny glass.
(LCD panels tend to be less
reflective due to their polarizing
nature.) In a room with a lot of
ambient light, the image on a
plasma is harder to see. To
counter this, you tend to turn the
contrast all the way up.
This leads to the other big
reason that plasma isn’t the best
choice for a room with lots of
ambient light. Plasmas have phos-
phors, which glow so that you can
see a picture. The adage “twice as
bright, half as long” comes into
play here. For the best longevity
of a plasma, you don’t want to run
it full-bore all the time. Partial-
bore will be just fine. Turning the
contrast all the way up is also a
great way to invite burn-in. As
you probably know, burn-in hap-
pens when a phosphor doesn’t like
getting turned off and stays par-
tially lit for a time after it was
instructed to go out. On the
screen, this appears as a ghost of
whatever image was on the screen
before. Plasmas are getting much
better at preventing burn-in
(either by using different phos-
phors, different gas, or some elec-
tronic gadgetry). If you turn your
contrast control down, though,
this will help even more.
Or, say you have a dedicated
home theater room. When you
watch something in there, it’s usu-
ally dark. In that case, an LCD
isn’t a good choice. LCDs are
bright. Generally, they’re brighter
than plasmas. Some LCD panels
have adjustable backlights that let
you vary the light output, but not
all do. Regardless, they are capa-
ble of tremendous, blinding light.
In a dark room, a really bright dis-
play can be very fatiguing. Often,
if the LCD doesn’t have an
adjustable backlight, adjusting the
contrast control won’t make the
display very dark. Worse, turning
down the brightness control fur-
ther (assuming you have it set cor-
rectly) also won’t make the display
any darker. So reducing the con-
trast control just reduces your
>Full-On/Full-Off Contrast Ratio—966:1;
ANSI Contrast Ratio—473:1
>Measured Resolution with the Leader LT-446:
480: 480 (per picture height)
720p/1080i: out to the limits of the 1366
by 768 panel
>DC Restoration (poor, average, good, excellent):
Average (poor in daylight mode)
>Color Decoder (poor, average, good, excellent):
Good
>Measured Color Points:
Red Color Point: x = 0.636, y = 0.342
Green Color Point: x = 0.284, y = 0.603
Blue Color Point: x = 0.147, y = 0.074
The left chart shows the 42LP1D’s gray scale relative to
its color temperature at various levels of intensity, or
brightness (20 IRE is dark gray; 100 IRE is bright white).
The gray scale as set by the factory, in the warm color-
temperature mode and the nighttime picture mode,
measures very cool with dark images and gets some-
what warmer with brighter images. After making
adjustments using the Photo Research PR-650, the
gray scale measures within 670 Kelvin of D6500, the
accurate color temperature, across the entire range
(though mid-tones start drifting cool).
The right chart shows the gray scale (or color tempera-
ture) relative to the color points of the display’s red, green,
and blue color filters. These are fairly close to those
specified by SMPTE. Green is slightly blue-green. Red is
slightly reddish-orange. Blue is pretty much accurate.
Using a full-field 100-IRE white (142 foot-lamberts)
and a full-field 0-IRE black (0.147 ft-L), the contrast
ratio was 966:1. Using a 16-box checkerboard pattern
(ANSI contrast), the contrast ratio was 473:1.—GM
5000
5500
6000
6500
7000
7500
8000
8500
9000
9500
10000
20 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
IRE
Color Temperature
Color Temp - Before
Color Temp - After
Color Temperature
Blue
Green
Red
LG Red
LG Green
LG Blue
D6500 K
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.1 0.2 0.3 0.4 0.5 0.6 0.7
DTV Phosphors
D6500
Color Temp - Before
Color Temp - After
HT Labs Measures: LG 42LP1D LCD HDTV
> FEATURES
Type: LCD
Screen Size (diagonal) 42 inches
Native Resolution / Aspect Ratio: 1,366 by 768 / 16:9
Lamp Life: 60,000 hours
Wall Mount or Stand Included?: Stand
Dimensions (H x W x D, inches): 31.6 x 50.8 x 9.7 (on
stand)
Weight (pounds): 101.4 (with stand)
Price: $7,000
>CONNECTIONS
Inputs:
Video: HDMI (1), RGB (1), component video (2),
S-video (2, shared), composite video
(2, shared), RF (2)
Audio: optical (2), stereo RCA pairs (4), stereo
mini-plug (1)
Outputs:
Video: composite video (1)
Audio: optical (1), stereo RCA pair (1)
Additional: CableCARD (1), FireWire IEEE 1394 (2),
CF Memory Card Slot Type 1/II (1),
Memory Card Slot for most other type
(1), Remote control mini-plug (1),
G-Link (1), RS-232 (1)
LG 42LP1D LCD HDTV
AT A GLANCE
142
0.147

contrast ratio. Besides the fatigue,
a high black level is far more
noticeable in a dark room than in
a well-lit one.
So, generally speaking, if you
watch TV more at night or in a
dark room, plasma is a better
choice. If you watch a lot of TV
during the day, then LCD is the
better choice.
Lies, Lies, Lies (Not Just
a GN’R Album)
In an attempt to sway more buyers
to the technology that they manu-
facture, each side of the flat-panel
war has put a lot of misinforma-
tion out there. Add in the lack of
training and knowledge on the
sales side, and this makes for a lot
of deception (both intentional and
unintentional, which is just as
bad). So let’s see if we can
straighten out some of these mis-
conceptions.
Burn-In
Like I mentioned above, burn-in
occurs when a plasma phosphor
continues to glow after it has been
told not to. With normal viewing,
and if you don’t turn the contrast
control all the way up, it’s doubt-
ful that burn-in will be a problem.
Also, at least one manufacturer
has found that burn-in is signifi-
cantly less likely to occur after
100 or so hours of usage. LCDs
don’t burn in. They can exhibit
something called persistence,
where pixels get “stuck.” This may
look similar to burn-in, but it’s
reversible and not common.
Life Span
This is one that each side likes to
throw at the other. A plasma dis-
play is often rated with a half-
life—the time until it’s half as
bright as it was when it was new.
Half-life is typically about 60,000
hours. Your plasma will still be
perfectly watchable after this
time; it just won’t be as bright.
This is a gradual process, so grad-
ual that you probably won’t even
notice it’s happening. LCDs, on
the other hand, have a life span of
about 60,000 hours, after which
you will need to replace the back-
light. This is not like changing a
light bulb, and you can’t do it
yourself. Even if you think you’d
do this after 60,000 hours, it’s
doubtful that it would be cost-
effective. Say you average six
hours of TV watching a day, every
day. That means you won’t reach
60,000 hours for about 27 years.
Think of the TV you had 27 years
ago. I’d bet money that, in five
years, whatever you buy now will
be half as expensive and twice as
good. Never mind in 10 years. In
other words, either type of flat-
panel display should last just fine.
Viewing Angle
LCD manufacturers like to claim
wide viewing-angle numbers,
most of which are bunk. While
you can certainly view an LCD
from the claimed angles, it won’t
look as good as it does when you
are right in front of the screen.
The contrast ratio goes down, the
black level goes up (and often
changes color), and colors desatu-
rate. The severity of this effect
varies with make and model,
although it has gotten a lot better
over the years. If you have a wide
couch or seats off to an angle (any
angle, including up and down),
check in a store to see if this is
going to be a problem for you.
Power Consumption
This is a tough one. LCDs have a
steady backlight, which draws the
same amount of power regardless
of what’s on the screen. The liquid
crystals require very little power.
Plasma power consumption varies
depending on what’s on the
screen. So, with a dark movie, a
plasma could draw less power
than an LCD, whereas, on a foot-
ball game, it would probably draw
more. Also, if you turn down the
contrast control (yes, that again),
a plasma will draw less power,
although it still may draw more
than an LCD. If an LCD has an
89 86 94 90 89
42LP1D LCD HDTV, $7,000 >LG Electronics, (800) 243-0000, www.lgusa.com >Dealer Locator Code LGE
General information
> Smooth stand swivel
> Good fit and finish
> Low price for an LCD,
but still high compared
with plasmas
> HD tuner
> TV Guide On Screen
>What a contrast ratio
>Blindingly bright
> Nice remote, but it
should be more backlit
> Menu adjustments
block large amounts of
screen
Build Quality Value Features Performance Ergonomics
89
89
OVERALL RATING
If you’re looking for a flat panel
for your living room, this one is
very bright, has a great contrast
ratio, and is fairly inexpensive,
although it still costs more than
most plasmas in its size class.
LG 42LP1D LCD HDTV
[
HIGHLIGHTS
4422LLPP11DDLLCCDDHHDDTTVV
Very bright
Impressive contrast ratio
from the test bench LG ELECTRONICS 42LP1D LCD HDTV AND 42PX4D PLASMA HDTV
Geoffrey found the
42LP1D LCD’s remote con-
trol to be laid out well, but
it lacks backlighting.
^

adjustable backlight, turning that
down should also help. If power
consumption is a concern for you,
again, figure out what you’ll be
using the display for.
How Are You Going to…
Never Mind
Hopefully, this has cleared up
some of the misinformation that’s
out there. Not to sound
like a broken record
(record…record…),
but the key to smart
buying really is how
you’re going to use the
display. With that in
mind, you can focus on
what it is you’re really
looking for in each tech-
nology. What follows are
reviews of two 42-inch
flat-panel displays from
LG Electronics: one
plasma and one LCD.
For such seemingly simi-
lar displays, they per-
form pretty differently.
Their processing perfor-
mance and a few other
things, however, were
nearly identical.
LG 42LP1D LCD HDTV
LCDs are dropping very quickly
in price. A little more than a year
ago, a 42-inch LCD cost close to
$10,000. While LCD still com-
mands a premium over plasma,
that difference is shrinking.
The story here is
light output. At 142
foot-lamberts, we’ve
only measured one
LCD that was brighter
than the 42LP1D, and
it was 10 inches
smaller diagonally. For
that matter, we’ve
only reviewed a hand-
ful of dis-
plays that
were
brighter,
period. (I’ve
exhausted
my supply of
clever
extreme-
light-output
jokes, so feel
free to insert
your favorite
here.) This,
and the fact
that the LCD
screen does a
great job of muting
room reflections, means
that this display will do a
great job in a well-lit
room. The image really
pops off the screen.
In terms of black level, the
42LP1D is no slouch, either, mea-
suring 0.147 ft-L. This is just a bit
higher than average for the LCDs
we’ve measured. But, thanks to
one of the highest light outputs,
the 42LP1D’s 966:1 full-on/full-
off contrast ratio is the highest of
any flat-panel display we’ve mea-
sured. For an LCD to take this
crown is a real achievement. But,
when you compare it with a
plasma with a good black level
(the 42PX4D, for example), the
42LP1D’s black level is noticeably
high. Using this LCD, the opening
of Master and Commander doesn’t
look terribly filmlike, with a dark
gray filling in as the best black
level.
88 91 94 90 89
42PX4D Plasma HDTV, $5,000 >LG Electronics, (800) 243-0000, www.lgusa.com >Dealer Locator Code LGE
General information
>Slight hum when on
>Good fit and finish
>HD tuner includes
CableCARD
>Only average price
>Lots of inputs
>HD tuner
>Great black level
>Great contrast ratio
>Well-designed
remote isn’t backlit
>Menu adjustments
block large amounts of
screen
Build Quality Value Features Performance Ergonomics
90
90
OVERALL RATING
You may have to pay a little
more for it, but the 42PX4D
offers strong performance for
the money.
LG 42PX4D PLASMA HDTV
Left: The 42PX4D plasma’s
remote features a button
that activates and deacti-
vates the backlighting.
Above: Thanks to its out-
standing black level, the
42PX4D plasma is well
suited for use in a dedi-
cated home theater.
Screen image courtesy of Universal

The viewing angle is about aver-
age for an LCD from left to right,
but the up-and-down viewing
angle isn’t great. I wouldn’t plan
on mounting this display above
your fireplace.
The 42LP1D is pricier than its
plasma brother here, but you get a
much nicer aesthetic. The black-
gloss front looks very fancy. The
silver tube running along the
bottom is strange, but it looks nice.
LG 42PX4D Plasma HDTV
It’s inevitable that prices come
down over time, but it’s even
more interesting to watch the
decrease in black level and the
increase in light output. Achiev-
ing both without compromising
other factors is no small feat. Just
a year ago, plasmas’ contrast
ratios were only a few hundred.
Now several plasmas, like the
42PX4D, are close to 1,000:1.
The first thing you notice about
this display is its black level. At
0.027 ft-L, it ties with the 42-inch
Panasonic TH-42PX25 plasma
HDTV from our November 2004
issue (the second best we’ve ever
measured). The only plasma that
measured better was the 42-inch
Panasonic TH-42PD25 plasma
from the February 2005 Face Off,
at 0.023 ft-L. That’s dark. It’s not
quite blend-into-the-background
dark, but, compared with most
flat panels, it’s excellent. With the
LG 42PX4D, during dark scenes,
like the opening of Master and
Commander, shadows were actually
black. Not CRT black, mind you,
but great for a flat panel.
What came as a shock, though,
was the amount of light that the
42PX4D puts out. The Panasonic
from the Face Off put out 18.64 ft-
L from a full-white field. The
42PX34D puts out 25.38 ft-L.
That’s enough to give it the best
contrast ratio of any plasma we’ve
measured: 938:1. With a white
>Full-On/Full-Off Contrast Ratio—938:1;
ANSI Contrast Ratio—1327:1
>Measured Resolution with the Leader LT-446:
480: 480 (per picture height)
720p: 660 (pph)
1080i: out to the limits of the 1024
by 768 panel
>DC Restoration (poor, average, good, excellent):
Average (poor in daylight picture mode)
>Color Decoder (poor, average, good, excellent):
Excellent
>Measured Color Points:
Red Color Point: x = 0.653, y = 0.337
Green Color Point: x = 0.271, y = 0.658
Blue Color Point: x = 0.149, y = 0.059
The left chart shows the 42PX4D’s gray scale relative to
its color temperature at various levels of intensity, or
brightness (20 IRE is dark gray; 100 IRE is bright white).
The gray scale as set by the factory, in the warm color-
temperature mode and the movie picture mode, mea-
sures warm with the darkest images and gets cooler
as the light level increases. After making adjustments
using the Photo Research PR-650, the gray scale mea-
sures much better, within 189 Kelvin of D6500, the
accurate color temperature, across the entire range.
The right chart shows the gray scale (or color tem-
perature) relative to the color points of the display’s
red, green, and blue phosphors. These are off those
specified by SMPTE. Green is very oversaturated and
slightly bluish-green, red is slightly over saturated
and very slightly reddish-orange. Blue is slightly over
saturated and very slightly bluish-purple.
Using a full-field 100-IRE white (25.32 foot-
lamberts) and a full-field 0-IRE black (0.027 ft-L),
the contrast ratio was 938:1. Using a 16-box checker-
board pattern (ANSI contrast), the contrast ratio was
1327:1. The best contrast ratio was achieved with
the power save mode off. The brightest image was
achieved with the power save mode off and pro-
duced 71.86 ft-L with a 100-IRE window (it is normal
for a plasma to have lower light output on a full-
field white versus a white window).—GM
5000
5500
6000
6500
7000
7500
8000
20 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
IRE
Color Temperature
Color Temp - Before
Color Temp - After
Color Temperature
Blue
Green
Red
LG Red
LG Green
LG Blue
D6500 K
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.1 0.2 0.3 0.4 0.5 0.6 0.7
DTV Phosphors
D6500
Color Temp - Before
Color Temp - After
HT Labs Measures: LG 42PX4D Plasma HDTV
> FEATURES
Type: Plasma
Screen Size (diagonal): 42 inches
Native Resolution /
Aspect Ratio: 1,024 by 768 /
16:9
Half Life: 60,000 hours
Wall Mount or
Stand Included?: Stand
Dimensions
(H x W x D, inches): 27.8 x 49.3 x 11.6
(on stand)
Weight (pounds): 116.1 (with stand)
Price: $5,000
>CONNECTIONS
Inputs:
Video: HDMI (2), RGB (1), component video
(2), S-video (2, shared), composite
video (2, shared), RF (2)
Audio: optical (2), stereo RCA pairs (4),
stereo mini-plug (1)
Outputs:
Video: composite video (1)
Audio: optical (1), stereo RCA pair (1)
Additional: CableCARD (1), FireWire IEEE 1394 (2),
CF Memory Card Slot Type 1/II (1),
Memory Card Slot for most other
types (1), Remote control mini-plug
(1), G-Link (1), RS-232 (1)
LG 42PX4D PLASMA HDTV
AT A GLANCE
25.32
0.027
[
HIGHLIGHTS
4422PPXX44DDPPllaassmmaaHHDDTTVV
Great black level
Even better contrast ratio
from the test bench LG ELECTRONICS 42LP1D LCD HDTV AND 42PX4D PLASMA HDTV

window, the 42PX4D is more of a
screamer, putting out 71.86 ft-L. This
combo of black level and light output is
impressive and shows a real effort on LG’s
part to—oh, I don’t know—take over
the world?
Unfortunately, there are some nega-
tives. Color is one. The color points, as
you can see in the measurements box, are
pretty far off the SMPTE spec. With
video material, this comes across as an
abundance of color, and turning down the
color control only partially alleviates the
problem. As far as color goes, it’s one of
the least accurate displays we’ve mea-
sured in recent years. That’s not to say
that it looks cartoonish. It’s not that bad,
but it certainly isn’t as accurate as some
plasmas (or its LCD brother here). For
example, grass has a little more blue in it
than with other displays.
Noise, both visible and audible, is
another issue. Sitting at a normal viewing
distance, you can’t hear it; but get closer,
and you can hear it hum. Most plasmas do
this to some extent; it’s just something to
keep in mind. Video noise, on the other
hand, was more noticeable. With most
video, there was a fair amount of noise.
Darker scenes, such as the opening of
Master and Commander, appeared fairly
grainy. Turning down the sharpness con-
trol reduced the graininess somewhat, but
at the expense of detail. There was also a
fair amount of noise in gradations from
light to dark. While there were some
steps in the gradations, they were barely
noticeable on test patterns or video.
Phosphor lag, or the precursor to
burn-in, is much improved over the LG
RU-42PX11 plasma that was in the Feb-
ruary 2005 Face Off. It hasn’t been com-
pletely vanquished, though, and there are
a few electronic settings to help prevent it
from happening. An orbiter moves the
image around the screen very slightly. A
white wash puts up a white field to help
burn the screen uniformly (“washing” off
the burn-in), and inversion inverts the
colors of the image. This one is, shall we
say, trippy.
Aesthetically, the 42PX4D is pretty
normal, with a black bezel around the
screen that is a little too shiny. It has a
bevy of input and output options, yet
another aspect that belies this display’s
price. Price-wise, the 42PX4D isn’t
cheap, but it’s not too far above the
normal range.
Commonalities
Video processing is a mixed bag with
these two LG displays. With the Snell &
Wilcox Zone Plate test pattern, neither
display seemed to pick up the 3:2
sequence. With actual video material,
though, it picked it up fairly quickly.
Video processing, using the waving flag
from Video Essentials, is only OK. There
are some jagged edges, although they are
small. Both displays scale very well. LG’s
XD engine, which we lauded in the afore-
mentioned Face Off, doesn’t disappoint
here. It scales DVDs extremely well,
showing an excellent level of detail.
Overall, both displays show excellent
detail with HD and DVD. With some
program material, the LCD seemed
slightly sharper, but, with other material
(especially that with lots of fast motion),
it was a wash.
Both sets have built-in tuners and come
with TV Guide On Screen. The tuners do
a decent job of pulling in stations and
picked up all of the Los Angeles DTV
channels with just a small indoor antenna.
Keep in mind that our studio location
picks up DTV with ease, so your recep-
tion may vary. Channel switching is rea-
sonably fast, and deleting all of those
crappy SD channels is easy. A cool feature
that both displays have is evident when
you start picking a station directly, say by
pressing “2”: It shows a drop-down menu
of all the stations that have been scanned
that start with “2.” If you then dial in “28,”
the menu will then show “28-1,” “28-2,”
and so on so you can select that station
and go to it directly. It may not seem like
much of a time saver, but it actually is.
The remotes are laid out the same, but
the LCD remote is far more classy, with a
black-gloss finish that matches the display.
The power, mode, volume, and channel
buttons are backlit by a cool-looking
white light that you can activate (and
deactivate!) by a button on the side. It’s
amazing, the things we get excited about,
eh? On the plasma remote, only the
mode button is backlit. Both remotes
have a panel that hides the buttons for
secondary functions like aspect-ratio
adjustment, PIP, and so on. Overall, both
are laid out well and fit comfortably in the
hand.
Both displays have a front-panel func-
tion that shows you which input you’re
on, and both have aspect-ratio control for
all resolutions. Lastly, if you’re an ISF cal-
ibrator (or if you’re planning to get your
set calibrated), LG Electronics created a
hidden menu to make your life easier by
making the sets easier to calibrate. Its
implementation is terrific, and no, I
won’t give you the codes to get into it.
Pick Your Weapon
The LCD offers the best contrast ratio,
but its black level isn’t good enough for
hard-core theater duties. The plasma is
bright and has an impressive black level,
but its penchant for phosphor lag prevents
me from recommending that people run
it flat out in a well-lit living room. Side
by side, the differences are subtle. With
bright program material, the LCD is the
eye-catcher, with slightly less noise,
slightly more resolution, and more nat-
ural color. (Did I mention that it’s also
bright?) As soon as there’s black on the
screen, the plasma takes the lead. There is
no substitute for a good black level, and it
draws your eye right away.
So there you have it, two good exam-
ples of what LCD and plasma can offer.
It all just boils down to that final ques-
tion: How are you going to use it?
from the test bench LG ELECTRONICS 42LP1D LCD HDTV AND 42PX4D PLASMA HDTV
Posted with permission from the August 2005 issue of
Home Theater
® www.hometheatermag.com. Copyright 2005, PRIMEDIA Inc. All rights reserved.
For more information about reprints from
Home Theater
, contact Wright’s Reprints at 877-652-5295
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