000 00328pam a2200145a 44500
082 _a629.4
_bV617p2
100 _aVertregt, M.
245 1 _aPRINCIPLES OF ASTRONAUTICS
250 _a2nd rev.
260 _aAmsterdam
_bElsevier Pub.
_c1965
300 _a339
650 _aAstronautics
964 _gCIRC
997 _a58151 C
999 _c437076
_d437076