MIL-S-17917A (AMENDMENT-1), MILITARY SPECIFICATION: SANDWICH CONSTRUCTION, ALUMINUM ALLOY FACINGS, BALSA WOOD CORE (31-AUG-1971) [NO S/S DOCUMENT]
MIL-S-17917A (AMENDMENT-1), MILITARY SPECIFICATION: SANDWICH CONSTRUCTION, ALUMINUM ALLOY FACINGS, BALSA WOOD CORE (31-AUG-1971) [NO S/S DOCUMENT].