000 00343nam a2200145Ia 4500
008 141110s9999 xx 000 0 und d
020 _a84-7509-851-7
082 _a37.014.5
100 _aCarretero, Mario
245 _aConstructivismo y educacion
260 _aBuenos Aires [AR]
260 _bPaidos
260 _c2009
650 _aEducacion
999 _c1753
_d1753