000			00333nam a22001217a 4500
082			_a629.1366 _bGIL
100			_aGilbert, Glen A.
245			_aAir traffic contro: The uncrowded sky/ _cGilbert, Glen A.
260			_aWashington, _bSmithsonian institution press. _c1973.
300			_a111p.: _bill,; _c30 cm.
650			_aMCE
942			_cBK
999			_c8635 _d8635