000 00349nam a2200157 4500
008 160616s2001 000 0
245 _aChild's conception of number
100 _aPiaget, Jean
260 _aLondon
260 _bRoutledge
260 _c2001
300 _a248
020 _a0415168880
942 _cBK
_2BK19555
080 _a5 PIA
999 _c19555
_d19555