Unesco thesaurus a structured list of descriptors for indexing and retrieving literature in the fields of eduction, science, social science, culture and communication
| Egile korporatiboa: | , |
|---|---|
| Formatua: | Liburua |
| Hizkuntza: | ingelesa |
| Argitaratua: |
Paris
Unesco
c1977.
|
| Gaiak: |