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 Advanced glider training - USA Voorschrift, Technical Manual, 1-815 armored division - USA Voorschrift, Field Manual, 17-100 Antiaircraft artillery : service of the piece 105-mm antiaircraft gun - USA Coast Artillery Field Manual, FM 4-130 Service of the piece : 155-mm gun M 1 - USA Field Artillery Field Manual, FM 6-90 Seacoast artillery : service of the piece 10-inch gun : (disappearing carriage) - USA Coast Artillery Field Manual, FM 4-65