1880
Wheeler, G.M.
1:253k
1879
Powell, John Wesley, 1834-1902.
1:900k
1879
U.S. Geological and Geographical Survey of the Territories
1:507k
1879
Hayden, Ferdinand Vandeveer
1:507k
1882
Bancroft, Hubert Howe.
1872
BELL, William Morrison.
1876
Wheeler, G.M.
1:1m
1883
Cram, George Franklin
1:2m
1878
Powell, John Wesley, 1834-1902.
1:630k
1879
Rand McNally and Company
1:2m