00284nam a2200121Ia 45000030006000000080041000060400015000471000013000622450049000752600009001245460012001330050017001450STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSykes,P.  aGuide book to mechanism in organic chemistry  c1975  aEnglish20220125170319.0