00840nam0-22002891i-450-990000045540403321000004554FED01000004554(Aleph)000004554FED0100000455420011111d--------km-y0itay50------baitay-------001yyRecent developments in visual low- approach and landing aids for aircraftMaurice A. Garbell.San FranciscoGarbell research foundation195119 p.ill.28 cmGarbell aeronautical series1AeroplaniAtterraggio629.13Garbell,Maurice A.ITUNINARICAUNIMARCBK99000004554040332113 F 07 1121373FINBCFINBCUNINAING01