MIL-D-85520 (AMENDMENT 1), MILITARY SPECIFICATION: DESIGN AND INSTALLATION OF ON BOARD OXYGEN GENERATING SYSTEMS IN AIRCRAFT, GENERAL SPECIFICATION FOR (16 JAN 1991)

MIL-D-85520 (AMENDMENT 1), MILITARY SPECIFICATION: DESIGN AND INSTALLATION OF ON BOARD OXYGEN GENERATING SYSTEMS IN AIRCRAFT, GENERAL SPECIFICATION FOR (16 JAN 1991).