000 00310 a2200109 4500
082 _a621 ANW-BEE
100 _aAnwar, Ali; (040119)
245 _aAdvance private branch exchange
260 _aIslamabad
_bDepartment of Electrical Engineering (Air University Main Campus)
_c2008.
300 _a134 p.
942 _cSP
999 _c13148
_d13148