- William R. Keefer
- Harold J. Brodrick
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- Geological Survey
- and Pacific Railroad Company St. Paul Milwaukee Chicago
- Union Pacific Railroad Company
- Carter H. Harrison
- Herbert Quick
- Orange Perry Barnes
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John L. Stoddard'ın Konferansları, Cilt 10 (10'in 10'u) Güney California; Colorado Nehri Büyük Kanyonu; Yellowstone Ulusal Parkı
John L. Stoddard