000 00269nam a2200109Ia 4500
008 200527s9999||||xx |||||||||||||| ||und||
082 _a155.413 PIA
100 _aPiaget, Jean
245 0 _aOrigin of Intelligence in the Child
264 _bPenguin
_c1977
300 _a464p.
999 _c15601
_d15601