000 00275 a2200109 4500
082 _a629.53
_bF317d
245 1 _aDESIGN FOR THE NATIONAL AIRSPACE UTILIZATION SYSTEM
260 _aU. S.
_bFederal Aviation Agency
_c1962
300 _a72
964 _gCIRC
997 _a39879 s C
999 _c453120
_d453120