Harold Biondo

Operation Question Mark

OTAC Research and Development Blueprints LK7657 - D.C. 15-1/2 I.D. Tube on T95 Chassis with 20M.M. Spotting Rifle and LK7658 - D.C. 15-1/2 I.D. Tube on T95 Chassis with 20 Inch Radar Range Finder

Frankford FY 59 PEMA AOS-2s

Aberdeen Proving Ground Development and Proof Services - Second Memorandum Report on Engineering Test of the T57 Range Finder

Aberdeen Proving Ground Development and Proof Services - First Memorandum Report on Engineering Test of the T57 Range Finder