MIL-STD-628D (NOTICE-3), MILITARY STANDARD: TRACTORS, FULL-TRACKED, LOW-SPEED (30-JUN-2015)
MIL-STD-628D (NOTICE-3), MILITARY STANDARD: TRACTORS, FULL-TRACKED, LOW-SPEED (30-JUN-2015)., MIL-STD-628D, dated 18-May-1998, remains inactive for new
design; however, the document is valid for use.