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Author
- Darton, Nelson Horatio, 1865-19482
- Lindgren, Waldemar, 1860-19392
- Ransome, Frederick Leslie, 1868-19352
- Todd, J. E. (James Edward), 1846-19222
- Barlow, Alfred E. (Alfred Ernest)1
- Barlow, Alfred E. (Alfred Ernest), 1861-19141
- Campbell, Marius Robinson, 1858-19401
- Fairbanks, Harold W. (Harold Wellman), b. 18601
- Fletcher, Hugh1
- Fuller, Myron L.1
- Geological Survey (U.S.)1
- Keith, Arthur1
- Prosser, Charles Smith, 1860-19161
- Richardson, G. B. (George Burr), 1872-19491
