Harold Biondo

CIOS Report XXVIII-2 - Artillery Experimental Range Hillersleben

WDGS Military Intelligence Service - Intelligence Research Project No. 1992 - Japanese Tank ''Ishi 108'' and German Assault Howitzer

ETO Ordnance Technical Intelligence Report No. 184 - 38 cm Rocket Projector on Tiger I Chassis

Ministry of Supply, Extracts of A.F.V. Division Letter No. 5

CIOS Report XXIX-22 - History of German Tank Development

CIOS Report XXVII-47 - Interrogation of Dr. Stiele von Heydekampf President of the Panzer Kommission