Encyclopedia Britannica world atlas world distributions and world political geography, political-physical maps, geographical summaries, geographical comparisons, glossary of geographical terms, index to political-physical maps
| Beste egile batzuk: | |
|---|---|
| Formatua: | Liburua | 
| Argitaratua: | Chicago
          Encyclopedia Britannica
    
        1952. | 
| Gaiak: |