00863nam0-22002891i-450-990000045590403321000004559FED01000004559(Aleph)000004559FED0100000455920011111d--------km-y0itay50------baitay-------001yy<<The >>visual range in daylight, darkness, and twilightMaurice A. Garbell.San FranciscoGarbell research foundation195236 p.ill.28 cmGarbell aeronautical series6629.13Garbell,Maurice A.3313ITUNINARICAUNIMARCBK99000004559040332113 F 07 1621378FINBCFINBCVisual range in daylight, darkness, and twilight112565UNINAING01