Military intelligence : identification of U.S. government aircraft - USA Voorschrift, Basic Field Manual, 30-30 Officer classification, commissioned and warrant : military classification and coding - USA Voorschrift, Technical Manual, 12-406 Heat treating and inspection of metals - USA Voorschrift, Technical Manual, 1-423 Parachutes, aircraft fabrics, and clothing - USA Voorschrift, Technical Manual, 1-440 Service of the piece : 75-mm gun M 2 A 3, truck-drawn and horse-drawn - USA Field Artillery Field Manual, FM 6-56 Aircraft engines - USA Voorschrift, Technical Manual, 1-405 Theory of flight - USA Voorschrift, Technical Manual, 1-400 Elementary weather for pilot trainees - USA Voorschrift, Technical Manual, 1-231 weather observer - USA Voorschrift, Technical Manual, 1-235 Radiotelephone procedure, Army Air Forces - USA Voorschrift, Technical Manual, 1-460 Theory of ballooning - USA Voorschrift, Technical Manual, 1-305 Physiological aspects of flying - USA Voorschrift, Technical Manual, 1-705