MIL-P-51431A (NOTICE 2), MILITARY SPECIFICATION: PLASTIC MOLDING AND EXTRUSION MATERIAL, POLYETHYLENE COPOLYMER, HIGH DENSITY (29 MAR 195) [NO S/S DOCUMENT]
MIL-P-51431A (NOTICE 2), MILITARY SPECIFICATION: PLASTIC MOLDING AND EXTRUSION MATERIAL, POLYETHYLENE COPOLYMER, HIGH DENSITY (29 MAR 1995) [NO S/S DOCUMENT].