[Smersh]

I think I remember looking at that book (Russian Tanks 1900-1970). If I remember correctly it's very out-of-date, obviosly, and some information is incorrect or missing. Since it was written in the 1970s, when a real lack of information existed about Soviet tanks.

I wouldn't reccommend it as a defintive, up-to-date, and correct guide. Its more important in gaging what the west knew of Soviet vehicles in the 1970s then accurate information.