000 00373nam a2200145Ia 4500
008 180710s9999 xx 000 0 und d
020 _a76066
082 _a370.15
_bDRU
100 _aDRUMMOND, Margaret
245 4 _aThe psychology and teaching of number
260 _aLondon
_bGeorge G.Harrap
_c1922
300 _a125 p.
650 _aEducational psychology
942 _cS
999 _c86998
_d86998