000 00295nam a2200121Ia 4500
100 _aSumner, W.L.
942 _cBK
654 _a
245 _aThe teaching of arithmetic and elementary mathematics
260 _aOxford
_bBasil Blackwell
_c1955
082 _a375.5
300 _bHb
_c19.8
_avii,268
999 _c400449
_d400449
041 _aeng