000 00295 a2200121 4500
020 _a9788125930969
084 _2Colon Classification
_aC:(B)
100 _aGUPTA, B D
245 _aMathematical Physics
250 _a4
260 _bVikas Publising House Private Limited
_c2021
942 _cGEN
999 _c625259
_d625259