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Author
- Geological Survey (U.S.)315
- United States. Bureau of the Census26
- Irwin, J. H., cartographer3
- Geological Survey of Canada2
- Instituto Geográfico e Cadastral (Portugal)2
- National Geographic Society (U.S.). Cartographic Section2
- Rodgers, John, 1914-20042
- Serviços Geológicos de Portugal2
- United States. Forest Service. Intermountain Region2
- Willard, Max Emery, 1914-2
- American Geographical Society of New York1
- Anderson, Margaret Swainson1
- Argentina. Ejército1
- Automobile Club of Southern California1
- Barcus, Frank, 1895-19611
- Burrus, R. F.1
- Cahen, L. (Lucien)1
- Cavalaria, Jose1
- Chapman, Charleton A., cartographer1
- Cobb, Edward Huntington, 1916-1
