Skip to search
Skip to main content
- Project Muse210
- ebrary, Inc166
- Adam Matthew Digital (Firm), digitiser63
- Lewis, Meriwether, 1774-180944
- Clark, William, 1770-183843
- Humboldt, Alexander von, 1769-185943
- Making of America Project41
- Thoreau, Henry David, 1817-186241
- United States. Army. Corps of Topographical Engineers35
- Irving, Washington, 1783-185930
- World Trade Press30
- Quaife, Milo Milton, 1880-195927
- Mackenzie, Alexander, 1764-182023
- Union Pacific Railroad Company20
- Frémont, John Charles, 1813-189019
- Vila, Marco Aurelio19
- Carver, Jonathan, 1710-178018
- Coues, Elliott, 1842-189918
- Olmsted, Frederick Law, 1822-190318
- Pan American Union18