00521nam a2200157Ia 4500100001500000942000700015654001600022245002500038260003200063082001600095300000900111546001200120999001700132952010700149952010700256  aGupta/B.D   cBK  amathematics  aMathematical Physics  bVikas pub.aNew Delhic1988  a530.15bGUP  a1238  aENGLISH  c28757d28757  001040708CRCaCRCEbCRCEd2023-03-17g75.00l0o530.15 GUPp1564r2023-03-17v75.00w2023-03-17yBK  001040708CRCaCRCEbCRCEd2023-03-17g75.00l0o530.15 GUPp1565r2023-03-17v75.00w2023-03-17yBK