MIL-D-8683C (AMENDMENT 1), MILITARY SPECIFICATION: DESIGN AND INSTALLATION OF GASEOUS OXYGEN SYSTEMS IN AIRCRAFT, GENERAL SPECIFICATION FOR (05 FEB 1988)
MIL-D-8683C (AMENDMENT 1), MILITARY SPECIFICATION: DESIGN AND INSTALLATION OF GASEOUS OXYGEN SYSTEMS IN AIRCRAFT, GENERAL SPECIFICATION FOR (05 FEB 1988).