Author
Powell, John Wesley, 1834-1902
3
United States. Army. Corps of Topographical Engineers
3
United States. War Department
3
Dellenbaugh, Frederick Samuel, 1853-1935
2
Derby, George Horatio, 1823-1861
2
Smithsonian Institution
2
Adams, Samuel, 1828-1915
1
Berton, Francis, 1830-1885
1
Chalfant, James McGowan
1
Coues, Elliott, 1842-1899
1
Goode, G. Brown 1851-1896
1
Humboldt, Alexander von, 1769-1859
1
Ives, J. C.
1
Johnson, Charles Granville, 1832-1914
1
Möllhausen, Balduin, 1825-1905
1
Sitgreaves Expedition
1
Sitgreaves, Lorenzo, 1811-1888
1
Stanton, Robert Brewster, 1846-1922
1
Thompson, A. H. 1839-1906
1