01156nam 2200361Ia 450 991069792400332120090122163648.0(CKB)5470000002393756(OCoLC)299085972(EXLCZ)99547000000239375620090122d1979 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierAutomatic reporting systems[electronic resource] altimeter setting and other operational dataWashington, D.C. :Dept. of Transportation, Federal Aviation Administration,[1979]2 pages, 8 unnumbered pages digital, PDF fileAdvisory circular ;AC 91-54Title from PDF caption (viewed Jan. 22, 2009)."2/26/79."Automatic reporting systems AltimeterAeronautical instrumentsAltimeter.Aeronautical instruments.GPOGPOBOOK9910697924003321Automatic reporting systems3505942UNINA