00305nam a2200133Ia 45000030006000000080041000060400015000471000017000622450026000792500010001052600027001155460012001420050017001540STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aKhanna, M.L.  aDifferential geometry  aFirst  bJai Prakash Nathc1976  aEnglish20220125170015.0