000 00277nam a2200121Ia 4500
100 _aPiaget, Jean
942 _cBK
654 _a
245 _aConception of reality in the time
260 _aLondon
_bRoutledge & Kegan Paul
_c1954
082 _a155.4
300 _bHb
_axiii, 386
999 _c366330
_d366330
041 _aeng