00325nam a2200133Ia 45000030006000000080041000060400015000471000019000622450040000812500010001212600031001315460012001620050017001740STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHatton, J.L.S.  aTheory of the imaginary in geometry  aFirst  bCambridge universityc1920  aEnglish20220125170015.0