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| 008 | 991125n 000 0 spa u | ||
| 035 | _aUPN01000099184 | ||
| 222 | _aEDUCACION NACIONAL | ||
| 245 | _aLa secundaria, escuela democrática del porvenir | ||
| 300 | _a206-209 | ||
| 362 | _a1944 Año 1, no. 3 abr. | ||
| 653 | 0 | _aEDUCACION SECUNDARIA | |
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| 905 | _aArticulo | ||
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