00336nam a2200133Ia 45000030006000000080041000060400015000471000041000622450038001032500010001412600022001515460012001730050017001850STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aButler Charies, H.; Wren Lynwood, F.  aTeaching of secondary mathematics  aThird  bMcgraw hillc1960  aEnglish20220125170025.0