| 000 | 00633nam a2200205 a 4500 | ||
|---|---|---|---|
| 005 | 20210219160040.0 | ||
| 008 | 080620s1973 mx r 000 0 spa d | ||
| 020 | _a9282010023 | ||
| 035 | _aUPN01000157231 | ||
| 049 | _aUNE | ||
| 080 | _a373.5 -053.6 DAE. | ||
| 100 | 1 | _aD'Aeth, Richard. | |
| 245 | 1 | 0 |
_aYouth and the changing secondary school / _cRichard D'Aeth. |
| 260 |
_aParís : _bUNESCO; _bInstitute for Education, _c1973. |
||
| 300 | _a72 p. | ||
| 690 | _aEnseñanza secundaria - Conferencia | ||
| 690 | _aJuventud - Curriculo - Enseñanza secundaria | ||
| 710 | 2 |
_aUNESCO. _bInstitute for Education |
|
| 905 | _aUNESCO | ||
| 999 |
_c129345 _d129345 |
||