This is a worthy general reference on modern battle-uniforms.
Most of the uniforms featured within date from the mid-2oth century, and even the first decade of the 21st.Its not entirely an all-inclusive listing, but it does give you a good overview of what various modern military units are wearing, or what they did wear. Some of the organizations featured within no longer exist, such as the Soviet Union and Warsaw Pact armies. In fact, the cover features East German N.V.A. soldaten (National Volks Armee). Much of these uniform items are easily available at military-surplus stores.
This is a neat little book, thoroughly packed with vivid color photos, and a great general reference for the military buff.