000 00243 a2200097 4500
001 52003
100 _aTalley D
245 _aBasic Electronic Switching for Telephone Systems
260 _aNew York
_bHayden Book Co.
_c
090 _c32810
_d32810
942 _aNUST-CAE
_cM
_c25348
999 _c287076
_d287076