found:Work cat.: Zaloga, S.J. T-54 and T-55 main battle tanks 1944-2004, 2004:introd. (T-54 tank, icon of Cold War confrontation in Europe) back cover (the T-54 and T-55 tanks are the most widely manufactured tanks of all time)
found:Wikipedia web site, 5 July 2005(the T-54 and T-55 main battle tanks were the Soviet Union's replacement for the WWII era T-34 tank; the T-54 succeeded the T-44 in production in 1947 and was redesigned in 1958 as the T-55 with a thicker turret casing, more powerful engine, and NBC protection)