00347nam a2200133Ia 4500008004100000082001500041100002200056245004500078250000800123260004500131300001300176942000700189999001700196190709s9999    xx            000 0 und d  a375.51 B76  aButler, Charles H 0aTeaching of Secondary School Mathematics  a3rd  aNew YorkbMcGraw-Hill Book Companyc1960  aviii,624  cBK  c35232d35232