00278nam a2200121Ia 45000030006000000080041000060400015000471000020000622450023000822600022001055460012001270050017001390STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHelinski Donald  aMolecular genetics  bMcgraw hillc1974  aEnglish20220125170443.0