MIL-P-4640A (AMENDMENT-3), MILITARY SPECIFICATION: PLASTIC FILM, POLYETHYLENE, FOR BALLOON USE (01-OCT-1965) [NO S/S DOCUMENT]
MIL-P-4640A (AMENDMENT-3), MILITARY SPECIFICATION: PLASTIC FILM, POLYETHYLENE, FOR BALLOON USE (01-OCT-1965) [NO S/S DOCUMENT].