00281nam a2200121Ia 45000030006000000080041000060400015000471000035000622450024000972600009001215460012001300050017001420STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSchreier Otto; Sperner Emanuel  aProjective geometry  c1961  aEnglish20220125170016.0