000
00349nam a2200157 4500
008
160616s2001 000 0
245
_a
Child's conception of number
100
_a
Piaget, Jean
260
_a
London
260
_b
Routledge
260
_c
2001
300
_a
248
020
_a
0415168880
942
_c
BK
_2
BK19555
080
_a
5 PIA
999
_c
19555
_d
19555