000 00251 a2200073 4500
245 0 _aElectronic Switching :
_bcentral office systems of the world /
_cJoel Amos J..
710 2 _aIEEE Press.
_eWydawca
_4pbl
260 _aNew York :
_bIEEE Press,
_c1976.
300 _aVII,279 s.;
_c34 cm.
999 _c5344
_d5344