00323nam a2200133Ia 45000030006000000080041000060400015000471000021000622450058000832500010001412600009001515460012001600050017001720STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aKlausmeier, H.J.  aPrinciples and practices of secondary school teaching  aFirst  c1953  aEnglish20220125165803.0