00273nam a2200121Ia 45000030006000000080041000060400015000471000024000622450027000862600009001135460012001220050017001340STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSmogorzhevsky, A.S.  aLobachevskian Geometry  c1976  aEnglish20220125170014.0