000 00268nam a2200109Ia 4500
008 220201s1985 xx 000 0 eng d
082 _a621
_bBAN
100 _aBanwat,RA etc.
245 0 _aT.B of applied physics
260 _bIndia publishing House
_c1985
942 _2ddc
999 _c83483
_d83483