000 00473nam a2200157Ia 4500
008 131223s9999 xx 000 0 und d
040 _aISI KOLKATA
041 _aEnglish
082 _a510.71
_bD562
100 _aDienes Z P
245 _aPower of mathematics : a study of the transition from the constructive to the analytical phase of mathematical thinking in children
260 _aLondon
_bHutchinson
_c1964
300 _a176p
650 _aMathematics
942 _cBK
999 _c57819
_d57819