000 00409nam a2200169Ia 4500
008 201023s9999||||xx |||||||||||||| ||und||
041 _aEnglish
100 _aBiswas , Nripendra N
245 0 _aPrinciples of Telephony
250 _a16th
260 _aBangalore
_bRadiant books
_c1992
300 _a138
365 _b25
650 _aGeneral Books
942 _cTB
999 _c5736
_d5736