LLL-B-810B (INTERIM AMENDMENT 1), FEDERAL SPECIFICATION: BUILDING BOARD, (HARDBOARD) HARD PRESSED, VEGETABLE FIBER (22-SEP-1976) [S/S BY ANSI-A13]
LLL-B-810B (INTERIM AMENDMENT 1), FEDERAL SPECIFICATION: BUILDING BOARD, (HARDBOARD) HARD PRESSED, VEGETABLE FIBER (22-SEP-1976) [S/S BY ANSI-A13].