00315nam a2200121Ia 45000030006000000080041000060400015000471000021000622450059000832600022001425460012001640050017001760STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aStansfield, W.D.  aSchaums outline series theory and problems of genetics  bMcgraw hillc1969  aEnglish20220125170339.0