00298nam a2200121Ia 45000030006000000080041000060400015000471000027000622450036000892600022001255460012001470050017001590STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aStansfield William, D.  aTheory and problems of genetics  bMcgraw hillc1969  aEnglish20220125170443.0