00335nam a2200121Ia 45000030006000000080041000060400015000471000020000622450060000822600042001425460012001840050017001960STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aTrehan,S.K.; Ed  aProceedings of the Indian National Science Academy No.6  bIndian National Science Academyc1979  aEnglish20220125165829.0