MIL-C-51179B, MILITARY SPECIFICATION: CARRIER, CHEMICAL-BIOLOGICAL MASK, ABC-M13A1 (16-SEP-1974) [NO S/S DOCUMENT]
MIL-C-51179B, MILITARY SPECIFICATION: CARRIER, CHEMICAL-BIOLOGICAL MASK, ABC-M13A1 (16-SEP-1974) [NO S/S DOCUMENT]., This specification covers one type of chemical-biological mask carrier.