US Army, Technical Manual, TM 5-3810-294-10, CRANE, TRUCK MOUNTED, 3/4 CU YD, 20-TON W/CLAMSHELL, DRAGLINE AND BACKHOE ATTACHMENTS, GED HARNISCHFEGE CORP MODEL M320T2 (NSN 3810-00-151-4431)
US Army, Technical Manual, TM 5-3810-294-10, CRANE, TRUCK MOUNTED, 3/4 CU YD, 20-TON W/CLAMSHELL, DRAGLINE AND BACKHOE ATTACHMENTS, GED HARNISCHFEGE CORP MODEL M320T2 (NSN 3810-00-151-4431)