000
00275 a2200109 4500
082
_a
629.53
_b
F317d
245
1
_a
DESIGN FOR THE NATIONAL AIRSPACE UTILIZATION SYSTEM
260
_a
U. S.
_b
Federal Aviation Agency
_c
1962
300
_a
72
964
_g
CIRC
997
_a
39879 s C
999
_c
453120
_d
453120