000 00390nam a2200157Ia 4500
999 _c65905
_d65905
005 20201230154318.0
008 190711s9999 xx 000 0 und d
082 _a621.385 B621P
100 _aBiswas, Nripendra N.
245 0 _aPrinciples of Telephony
260 _aBangalore
_bRadiant Books
_c1982
300 _ap.138
650 _aTelephony
650 _aDirector System
942 _cSW