T-13
G. Mazy,"T13 : Self-propelled 47-mm gun", WHEELS & TRACKS no.18, Battle of Britain Prints International Ltd., 1987
C. Foss, P. McKenzie "THE VICKERS TANKS", Patrick Stephens Limited, 1988
S. Zaloga, "Blitzkrieg", squadron/signal publications. 1980
Tanks. Armoured warfare prior to 1946. http://mailer.fsu.edu/~akirk/tanks/bel/Belgium.htm