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Author
- Geological Survey (U.S.)126
- Brazil. Divisão de Fomento da Produção Mineral19
- Tanzania. Idara ya Upimaji na Ramani15
- Lebanon. Wizārat al-Difāʻ al-Waṭanī.11
- Wahrhaftig, Clyde, 1919-6
- Green, L. H.3
- Scott, John C., 1926-3
- United States. Central Intelligence Agency3
- Amos, Dewey Harold, 1925-2
- Anderson, F. D.2
- Dibblee, T. W. (Thomas Wilson), 1911-2
- Instituto Geográfico Nacional (El Salvador)2
- New Zealand Forest Service2
- Title Atlas Co. (Minneapolis, Minn.)2
- Trien, E.2
- United States. Forest Service. Pacific Northwest Region2
- Vedder, J. G. (John Graham), 1926-2
- Bachman, George Odell1
- Bailes, Alan H.1
- Ball, N. L.1
