00319nam a2200133Ia 45000030006000000080041000060400015000471000022000622450031000842500010001152600031001255460012001560050017001680STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSchordinger Erwin  aSpace time and gravitation  aFirst  bCambridge universityc1935  aEnglish20220125170102.0