MIL-S-7998A (AMENDMENT 1), MILITARY SPECIFICATION: SANDWICH CONSTRUCTION CORE MATERIAL, BALSA WOOD (13 FEB 1978) [NO S/S DOCUMENT]

MIL-S-7998A (AMENDMENT 1), MILITARY SPECIFICATION: SANDWICH CONSTRUCTION CORE MATERIAL, BALSA WOOD (13 FEB 1978) [NO S/S DOCUMENT]., This amendment forms a part of Military Specification MIL-S-7998A, dated 6 March 1970, and is approved for use by al1 Departments and Agencies of the Department of Defense.