000 00311nam a2200121Ia 4500
008 220201s1981 xx 000 0 eng d
082 _a621.381
_bJAI
100 _aJain, R.K. Etc.
245 0 _aElectronics and telecommunications
260 _aDelhi
_bTechnical book centre
_c1981
300 _a412
942 _2ddc
999 _c22751
_d22751