000 00255nam a2200097Ia 4500
008 230416s9999||||xx |||||||||||||| ||und||
050 _aTL552 .T69 1967
245 0 _aAir transportation 1975 and beyond: a systems approach;
260 _c1968
942 _2lcc
_cBK
999 _c1485
_d1485