000 00225nam a2200097Ia 4500
008 230401s9999 xx 000 0 eng d
100 _aBISHWAS(NN)
245 0 _aPRINCIPLES OF TELEPHONE
260 _bRADEANT
942 _2ddc
_cBTECH
999 _c3708
_d3708