000 00303nam a2200145Ia 4500
100 _aBiswas, Nripendra N.
020 _a81-85273-09-X
365 _b25
942 _cBK
654 _a
245 _aPrinciples of telephony
260 _aBangalore
_c1970
082 _a621.385
300 _bPb
_a(6),138
999 _c353754
_d353754
041 _aeng