00311nam a2200121Ia 45000030006000000080041000060400015000471000030000622450040000922600028001325460012001600050017001720STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aGupta, R.C.; Saxena, P.N.  aViva-voce in advanced physics Vol I  bPragati Prakashanc1988  aEnglish20220125170116.0