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- Ryan, Thomas J. 16
- Bliss, Cornelius Newton, 1833-1911 10
- Hitchcock, Ethan Allen, 1835-1909 3
- DuBois, Howard W. 2
- United States. Department of the Interior 2
- Cannon, W. C. 1
- Chandler, George 1
- Cox, W. E., Mrs. 1
- Hague, A. (Arnold), 1840-1917 1
- Harper, William Rainey, 1856-1906 1
- Noble, John W. (John Willcock), 1831-1912 1
- Pierce, Frank 1
- Powell, John Wesley, 1834-1902 1
- Sapper, Karl, 1866-1945 1
- Teller, Henry Moore, 1830-1914 1
- Terry, William Houghton 1
- Weimer, J. W. 1
- Woodworth, J. B. (Jay Backus), 1865-1925 1
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- Geology 44
- Geological Survey (U.S.) 20
- Scientific expeditions 14
- Pitcher, John, 1854-1926 9
- Surveying 9
- Leased departments, concessions, etc. 7
- Yellowstone Park Transportation Company 7
- Wilder, Wilbur Elliott, 1856-1952 6
- Young, S. B. M. (Samuel Baldwin Marks), 1840-1924 6
- Anderson, George Smith 5
- Erwin, James Brailsford, 1856-1924 5
- Receipts (Acknowledgments) 5
- Conger, Patrick Henry, 1819-1903 4
- Geysers 4
- Hot springs 4
- Sedimentation and deposition 4
- Yellowstone Lake Boat Co. 4
- Yellowstone Park Association 4
- Iddings, Joseph Paxson, 1857-1920 3
- Wolff, John E. 3
- Allen, Henry T. (Henry Tureman), 1859-1930 2
- Camping 2
- Firearms 2
- Haynes, F. Jay (Frank Jay), 1853-1921 2
- Landscape protection 2
- Photography 2
- Recreation 2
- Wagons 2
- Algae 1
- Boutelle, Frazier Augustus, 1840-1924 1
- Buildings 1
- Complaints (Administrative procedure) 1
- Cress, G. O. 1
- Hague, A. (Arnold), 1840-1917 1
- Law enforcement 1
- Sapper, Karl, 1866-1945 1
- Smith, Hoke, 1855-1931 1
- Smithsonian Institution 1
- Stagecoaches 1
- Teachers 1
- Tour guides (Persons) 1
- United States. Army 1
- Wildlife conservation 1
- Yellowstone National Park Stage Line 1
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- Geographic Coverage...
- Yellowsone National Park 14
- Yellowstone National Park 8
- Black Sand Geyser Basin, Wyoming 1
- Fort Yellowstone, Wyoming 1
- Fountain Geyser, Wyoming 1
- Grand Canyon of the Yellowstone, Wyoming 1
- Mammoth Hot Springs (Wyoming) 1
- Mammoth Hot Springs, Wyoming 1
- Old Faithful Geyser, Wyoming 1
- Upper Geyser Basin, Wyoming 1
- Image79
- Digital Collection...
- Creator...
- Subject...
- Geology 79
- Paleontology 53
- Fossils 52
- Yellowstone National Park 15
- History 13
- Archaeological sites 10
- Archaeology 10
- Indigenous peoples 10
- Prehistoric peoples 10
- Coyote 7
- Winter 4
- Cities & towns 1
- Geysers 1
- History 1
- Parades & processions 1
- Photographs 1
- Rock Formations 1
- Rocks 1
- Sandstone 1
- Streets 1
- United States. Army. Corps of Engineers--Civil functions 1
- Vehicles 1
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- PDF Document8
- Video29
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- Subject...
- Geology 29
- Park Rangers 29
- Geysers 19
- Hot springs 17
- History 16
- Volcanism 14
- Animals 12
- Bison 8
- Cyanobacteria 5
- Glaciers 5
- Wildfires 5
- Bears 4
- Trees 4
- Algae 3
- Calderas 3
- Elk 3
- Grizzly bear 2
- Pelicans 2
- Volcanism 2
- Wild flowers 2
- Archeology 1
- Aspen 1
- Bear cubs 1
- Birds 1
- Birds 1
- Bison 1
- Geyser 1
- Glaciers 1
- Grizzly Bears 1
- Hiking 1
- Hot Springs 1
- Hot spring 1
- Hot springs 1
- Hydrothermal vents 1
- Marmots 1
- Mountains 1
- Rocks 1
- Scientific expeditions 1
- Snowmobiling 1
- Trees, Fossil 1
- Volcanism 1
- Volcanism 1
- Waterfalls 1
- Wildflowers 1
- Winter 1
- Wolves 1
- Wolves 1
- Wolves 1
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- Geographic Coverage...
- Yellowstone National Park 29
- Old Faithful (Wyo.) 6
- Upper Geyser Basin (Wyo.) 5
- Yellowstone Lake (Wyo.) 4
- Firehole River (Wyo.) 3
- Black Sand Geyser Basin (Wyo.) 2
- Grand Canyon of the Yellowstone (Wyo.) 2
- Howard Eaton Trail (Wyo.) 2
- Lower Falls of the Yellowstone River (Wyo.) 2
- Lower Geyser Basin (Wyo.) 2
- Mammoth Hot Springs (Wyo.) 2
- Mud Volcano (Wyo.) 2
- Norris Geyser Basin (Wyo.) 2
- Old Faithful Geyser (Wyo.) 2
- Upper Falls of the Yellowstone River (Wyo.) 2
- West Thumb (Wyo.) 2
- Castle Geyser (Wyo.) 1
- Crystal Falls (Wyo.) 1
- Everts, Mount (Wyo.) 1
- Fishing Bridge (Wyo.) 1
- Liberty Cap (Wyo.) 1
- West Thumb Geyser Basin (Wyo.) 1
- Yellowstone River 1
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