000 00357nam a2200157 a 4500
005 20210219153216.0
008 991125n 000 0 spa u
035 _aUPN01000084297
100 _aObaya, Adolfo
222 _aDIDAC
245 _aLa ciencia escolar
300 _a51-53
362 _a1995 No. 25
904 _aAC
_b022108
905 _aArticulo
999 _c71134
_d71134