000 00304nam a2200121Ia 4500
008 190601s9999 xx 000 0 und d
082 _a153.4
_bPIA
100 _aPiaget, Jean
245 0 _aPsychology and epistemology
260 _aMiddlesex
_bPenguin books
_c1972
300 _aviii, 107 p.
942 _cS
999 _c120560
_d120559