00311nam a2200121Ia 45000030006000000080041000060400015000471000021000622450055000832600022001385460012001600050017001720STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aStansfield, W.D.  aSchaums outline of theory and problems of genetics  bMcgraw hillc1969  aEnglish20220125170340.0