000 00247pam a2200109a 44500
082 _aNASA
_bTND-1137 -
100 _aKlahn R.
245 1 _aProject echo- antenna steering system
260 _a
_b
_c
700 _aGithens J. A.
997 _aTR9699 C
999 _c406210
_d406210