US Army, Technical Manual, TM 55-3810-01-165-14, TRANSPORTABILITY GUIDANCE, FOR THE CRANE, 7-1/2-TON, ROUGH-TERR KOEHRING TYPE I, (NSN 3810-01-165-0646), TYPE II, 3810-01-165-064,
US Army, Technical Manual, TM 55-3810-01-165-14, TRANSPORTABILITY GUIDANCE, FOR THE CRANE, 7-1/2-TON, ROUGH-TERR KOEHRING TYPE I, (NSN 3810-01-165-0646), TYPE II, 3810-01-165-064,