L-C-396B (NOTICE 1), FEDERAL SPECIFICATION: PLASTIC MOLDING AND EXTRUSION MATERIAL, POLYSTYRENE (06 OCT 1988) [S/S BY ASTM-D4549]
L-C-396B (NOTICE 1), FEDERAL SPECIFICATION: PLASTIC MOLDING AND EXTRUSION MATERIAL, POLYSTYRENE (06 OCT 1988) [S/S BY ASTM-D4549].