Author
Derby, George Horatio, 1823-1861
2
Powell, John Wesley, 1834-1902
2
United States. Army. Corps of Topographical Engineers
2
United States. War Department
2
Chalfant, James McGowan
1
Dellenbaugh, Frederick Samuel, 1853-1935
1
Humboldt, Alexander von, 1769-1859
1
Ives, J. C.
1
Möllhausen, Balduin, 1825-1905
1
Smithsonian Institution
1
Stanton, Robert Brewster, 1846-1922
1