Dupes, do you want a book to use or will a website be sufficient? If you only need to see the pattern used, you can google 'DPM camoflague' and will get several useful articles; wikipedia had a good overall history of DPM camo ( a few mistakes in it) and a few good colour photos of the pattern. Since I see you live in the U.S., you can check with a store called the Sportsman's Guide; they usually have DPM jackets on sale at very cheap prices that are of the colouration suitable for the Falklands era--I even managed to get an early 68 pattern from them (they didn't know it!). As far as books go, I would highly recommend Osprey's Men-At-Arms Series #133 Battle for the Falklands (1) Land Forces. It gives an excellent rundown on the uniform items used in the campaign on both sides, but especially the British. It has some excellent photos (although in B&W) and some of Mike Chappell's best plates on British uniforms I have seen. This book is usually on E-Bay-- I bought an extra one just to keep on my workbench. The colours I use for DPM are close to those used for the 3-colours used for late WWII German Armour, though DPM has black added to it and the base sand colour could be toned down a bit . The DPM colours have had different tints in them over the years, and the early polyester jungle uniforms had some really strange colours in them, especially the brown, but there is almost no variation between fabrics today. Another cheap but accurate source for photos is from a surplus store in London called Silverman's; I believe it is
www.Military.co.uk; will have to check. They usually have colour pictures of available DPM uniforms, often including original Falklands era parkas. Do you have figures already picked out? If not, let me know I can make some suggestions. Most on market are in current uniforms/headgear; helmets in Falklands era much different than today's. Long answer, hope some of it useful.