000			00490nam a2200169 4500
003			OSt
008			220602b |||||||| |||| 00| 0 eng d
082			_a155.4 _bPIA
100			_aPiaget, Jean
245			_aThe child's conception of space
260			_aLondon : _bRoutledge and Kegan Paul, _c1956.
300			_axii, 490p.; _c24cm
650		0	_aPremadasa Udagama Collection
650		0	_aE.L Wijemanna Collection
650		0	_aDifferential and developmental psychology
942			_2ddc _cSR
999			_c94547 _d94547