000 00319nam a2200121Ia 4500
100 _aGinsburg, Herbert
020 _a0-442-22695-0
942 _cBK
245 _aChildren's Arithmetic : how they learn it and how you teach it
260 _aLitton Educational, Ginsburg
_c1977
082 _a372.7 Gin
300 _aix, 197
999 _c14432
_d14432