000			00344nam a2200145Ia 4500
008			170101s1970 xx 000 0 und d
082			_a121 P52G
100			_aPIAGET, Jean
245		0	_aGenetic epistemology
260			_bN. Y. _c1970
300			_a84p
650			_aKNOWLEDGE, THEORY OF
653			_aKNOWLEDGE, THEORY OF
942			_2ddc _cB
999			_c38282 _d38282