00303nam a2200121Ia 45000030006000000080041000060400015000471000028000622450040000902600022001305460012001520050017001640STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBeharinger Marjorie, P.  aTechniques and materials in biology  bMcgraw hillc1973  aEnglish20220125170424.0