000 00291nam a2200097Ia 4500
008 120224s9999 xx 000 0 und d
082 _a155.413
_bARY
100 _aArya, S.C.
245 _aDevelopment of scientific concepts among children
260 _bNational Psychological
_aAgra
_c1988
999 _c141209
_d141209