000 00273pam a2200097a 44500
082 _aNASA
_bTND-1127 -
100 _aWilliam C. Jakes
245 1 _aParticipation of bell telephone laboratories in project echo and experimental results
260 _a
_b
_c
997 _aTR9806 C
999 _c406236
_d406236