L-P-391D (AMENDMENT 1), FEDERAL SPECIFICATION: PLASTIC SHEETS, RODS AND TUBING, RIGID CAST, METHACRYLATE (MULTI-APPLICATION) (06 JUN 1990) [S/S BY ASTM-D4802 AND ASTM-D5436]
L-P-391D (AMENDMENT 1), FEDERAL SPECIFICATION: PLASTIC SHEETS, RODS AND TUBING, RIGID CAST, METHACRYLATE (MULTI-APPLICATION) (06 JUN 1990) [S/S BY ASTM-D4802 AND ASTM-D5436].