Manylion Llyfryddiaeth
| Awdur Corfforaethol: |
National Geographic Society (United States). Cartographic Division |
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| Awduron Eraill: |
Doyle, Robert E.,
Grosvenor, Melville Bell,
Grosvenor, Gilbert M.,
Peele, William T.,
Cook, David W. 1931- |
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| Fformat: | Map
|
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| Cyhoeddwyd: |
Washington, D.C.
The Society
c1977.
|
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| Pynciau: | |
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