Documento principal de trabajo /
| Corporate Author: | |
|---|---|
| Format: | Conference Proceeding Book |
| Language: | Spanish |
| Published: |
Paris :
UNESCO,
1979.
|
| Series: | Programa general de informacion
|
| Subjects: |
| Item Description: | Datos tomados de la cubierta. |
|---|---|
| Physical Description: | xxxv, 116, 4 páginas ; 30 cm.-- |