01148nam 2200313Ka 450 991069770320332120081124145329.0(CKB)5470000002391946(OCoLC)276305565(EXLCZ)99547000000239194620081124d1996 ua 0engtxtrdacontentcrdamediacrrdacarrierPressurization, ventilation and oxygen systems assessment for subsonic flight including high altitude operation[electronic resource][Washington, D.C.] :U.S. Dept. of Transportation, Federal Aviation Administration,[1996]12 pages digital, PDF fileAdvisory circular ;AC no. 25-20"9/10/96."Title from PDF file caption (viewed Nov. 24, 2008).AirplanesPressurizationAirplanesPressurization.GPOGPOBOOK9910697703203321Pressurization, ventilation and oxygen systems assessment for subsonic flight including high altitude operation3091946UNINA