MIL-C-51179C (AMENDMENT-1), MILITARY SPECIFICATION: CARRIER, CHEMICAL-BIOLOGICAL MASK, ABC-M13A1 (05-JUL-1991) [NO S/S DOCUMENT]
MIL-C-51179C (AMENDMENT-1), MILITARY SPECIFICATION: CARRIER, CHEMICAL-BIOLOGICAL MASK, ABC-M13A1 (05-JUL-1991) [NO S/S DOCUMENT].