000 00406nam a2200169Ia 4500
003 In-KoJDB
008 161102s9999 xx 000 0 und d
040 _aJDBI
041 _aeng
082 _a372.21
_bPIA
100 _aPiaget, Jean
245 _aTHE CHILD'S CONCEPTION OF NUMBER
260 _aLONDON
_bROUTLEDGE AND KEGAN PAUL LTD.
300 _aix, 248 p.
650 _aCHILD EDUCATION
942 _cBK
999 _c5485
_d5485