| 000 | 00706nam a2200229 a 4500 | ||
|---|---|---|---|
| 005 | 20210219152830.0 | ||
| 008 | 991125n 000 0 eng u | ||
| 035 | _aUPN01000062717 | ||
| 100 | _aGutierrez, Roberto | ||
| 222 | _aREVIEW OF EDUCATIONAL RESEARCH | ||
| 245 | _aAchievement effects of the nongraded elementary school : a best evidence synthesis | ||
| 300 | _a333-376 | ||
| 362 | _a1992 62, no. 4 | ||
| 653 | 0 | _aEDUCACION PRIMARIA | |
| 653 | 0 | _aGRUPOS DE ENSE\197ANZA HETEROGENEA | |
| 653 | 0 | _aPROGRAMA DE REPARTIMIENTO INSTRUCCIONAL | |
| 653 | 0 | _aPROGRESION FLEXIBLE | |
| 653 | 0 | _aRENDIMIENTO ACADEMICO | |
| 700 | _aSlavin, Robert E. | ||
| 904 |
_aAC _b000528 |
||
| 905 | _aArticulo | ||
| 999 |
_c61834 _d61834 |
||