00305nam a2200121Ia 45000030006000000080041000060400015000471000020000622450041000822600031001235460012001540050017001660STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aNorthcott, D.G.  aFirst courses of homological algebra  bCambridge universityc1973  aEnglish20220125170029.0