Intermediate Direct Support and Intermediate General Support Maintenance Manual: Tank, Combat, Full-tracked, 105-MM Gun, M1 (2350-01-061-2445) and Tank, Combat, Full-tracked, 105-MM Gun, IPM1 (2350-01-136-8738) and Tank, Combat, Full-tracked, 120-MM Gun, M1A1 (2350-01-087-1095) : General Abrams : Sighting and Fire Control, Volume 2
Jan. 1989 · Headquarters, Department of the Army