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| 005 | 20210219153047.0 | ||
| 008 | 991125n 000 0 spa u | ||
| 035 | _aUPN01000075183 | ||
| 100 | _aHerrera Maas, Roberto | ||
| 222 | _aEDUCACION 2000 | ||
| 245 | _aEl Fracaso Escolar | ||
| 300 | _a37-39 | ||
| 362 | _a1999 Vol.5, No.51 | ||
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| 905 | _aArticulo | ||
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