00303nam a2200121Ia 45000030006000000080041000060400015000471000020000622450032000822600038001145460012001520050017001640STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSingal, M.K. Ed  aMathematics students vol 40  bIndian Mathematical Societyc1972  aEnglish20220125170027.0