00422nam a2200121Ia 4500008004100000040001700041082002300058100002400081245008200105260003100187300001400218650006800232190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta387.7bN626A  aNicholson, Joseph L 0aAir transportation managementbits practices and policiescJoseph L Nicholson  aNew YorkbJohn Wileyc1951  aix, 443p.  aAirlines management; Aeronautics, Commericial; Air mail service