1878
Wheeler, G.M.
1:253k
1846
Preuss, Charles
1:634k
1879
U.S. Geological and Geographical Survey of the Territories
1:507k
1861
Beckwith, E.G.
1:760k
1873
Gray, Ormando Willis
1:2m
1901
Murray-Aaron, Eugene, 1852-1941.
1:1m
1889
Rand McNally and Company
1903
