MIL-C-51179B (AMENDMENT-1), MILITARY SPECIFICATION: CARRIER, CHEMICAL-BIOLOGICAL MASK, ABC-M13A1 (10-JUL-1986) [NO S/S DOCUMENT]
MIL-C-51179B (AMENDMENT-1), MILITARY SPECIFICATION: CARRIER, CHEMICAL-BIOLOGICAL MASK, ABC-M13A1 (10-JUL-1986) [NO S/S DOCUMENT].