Cold War US MBT Prototypes Archives - Tank Encyclopedia
Were there any non-mass produced tanks that were used in war, or any prototype tanks? - Quora
AMPS Reviews - Schiffer Pub. - Legends of Warfare, M60 Tank - US Cold War MBT - Armor Modeling & Preservation Society
T-72 - Wikipedia
British School of Tank Technology (STT) and other bureau designs 1950-1970
Cold War Swiss Prototypes Archives - Tank Encyclopedia
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United States of America (Cold War) - Tank Encyclopedia
Nemesis MBT: Britain's 1970s Futuristic Tank Concept
Cold War British MBT Prototypes Archives - Tank Encyclopedia