00294nam a2200121Ia 45000030006000000080041000060400015000471000019000622450031000812600031001125460012001430050017001550STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aNunn Percy, T.  aRelativity and gravitation  bUniversity of Londonc1923  aEnglish20220125170022.0