War Department Technical Manual TM9-219. Basic Aircraft Machine Guns, Cal. .50, T36 And T25E3(M3). 15 x 22cm. 151p, April 1945. 'Restricted' manual with technical information, use, and care of the weapons, ammunition and accessory equipment. Excellent information, photographs and diagrams throughout. Very good used condition. Old personal library sticker to inside front cover. Stock code P17091.