Sound recording sets AN/UNQ-1 and AN/UNQ-1A - USA Voorschrift, Technical Manual, 11-2522 Signal Corps : Fixed signal communication systems - USA Voorschrift, Army Regulations, No. 105-20 Speedometers, tachometers, and recorders : Ordnance maintenance - USA Voorschrift, Technical Manual, 9-1829A Line units BE-77, BE-77-A and BE-77-B - USA Voorschrift, Technical Manual, 11-359 Multimeters TS-352/U, TS-352A/U, and TS-352B/U - USA Voorschrift, Technical Manual, 11-5527