000 00271nam a2200109Ia 4500
008 220201s1990 xx 000 0 eng d
100 _aHare Har Lal & Sawhubg
245 0 _aApplied physics
260 _bNew Delhi : Tata Mc Graw hill
_c1990
300 _a255
942 _2ddc
999 _c85188
_d85188