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Author
- Geological Survey (U.S.)57
- Fuller, Myron L.2
- Johnson, William D., Jr.2
- Swadley, W. C.2
- Bergendahl, M. H. (Maximilian Hilmar), 1921-1
- Campbell, Marius Robinson, 1858-19401
- Clark, Lorin D.1
- Norris, Ronald L. (Ronald Lee)1
- Spencer, Frank Darwyn, 1904-1
- Waddell, Courtney1
- Wier, Charles E. (Charles Eugene), 1921-1
- Wier, Charles E. (Charles Eugene), 1921- cartographer1
- Withington, Charles F. (Charles Francis), 1930-1
