00285nam a2200121Ia 45000030006000000080041000060400015000471000021000622450042000832600009001255460012001340050017001460STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aKieffer, W.F. Ed  aJournal of Chemical Education Vol. 39  c1962  aEnglish20220125165851.0