00271nam a2200121Ia 45000030006000000080041000060400015000471000019000622450030000812600009001115460012001200050017001320STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aRamanathan, A.  aElements of pure geometry  c1940  aEnglish20220125165945.0