Kagero has published a series known as “Mini-Topcolors” oriented toward modelers. Each book includes color profiles and decals in several scales.
“Barbarossa 1941,” the 25th title in the series, concentrates on armor involved in the invasion of Russia. As such, most of the profiles are of German tanks, but there are a couple of T-34/76 and a KV-2. There are a total of 18 color profiles in the book.
A very neat detail is that, accompanying most of the profiles, there is a black and white picture which was used by the artist to create the profiles. Each profile also includes a small paragraph in English and Polish describing some details on the specific location or time that the reference picture was taken.