000 00423nam a2200145Ia 4500
008 180713s9999 xx 000 0 und d
082 _a539 G1
100 _a"Gupta, A B "
245 0 _aModern Physics
260 _aKolkata
260 _b Books and Allied
260 _c2016
365 _b725
942 _cBK
999 _c115435
_d115435