000 00277nam a2200121Ia 4500
008 220201s1987 xx 000 0 eng d
082 _a530
_bNAR
100 _aNarayana rao,BV
245 0 _aModern physics
260 _bWiley eastern Ltd.
_c1987
300 _a242
942 _2ddc
999 _c83829
_d83829