000 00420nam a2200169 a 4500
005 20210219153444.0
008 991125n 000 0 u
035 _aUPN01000100976
222 _aSCIENCE AND CHILDREN
245 _aSpringtime science
300 _a26-27
362 0 _a1993 Vol. 30, no. 7
653 0 _aEDUCACION CIENTIFICA
653 0 _aEDUCACION BASICA
904 _aAC
_b038787
905 _aArticulo
999 _c77346
_d77346