000 00287nam a2200133Ia 4500
003 IN-KoSCC
008 211107s9999 000 0 eng
082 _a370.1/359
100 1 _aPotter,F.F
245 1 _aTeaching of arithmetic
260 _c1952
653 _aEducation
942 _cBK
999 _c37556
_d37556