1881
Wheeler, G.M.
1:253k
1846
Preuss, Charles
1:634k
1879
U.S. Geological and Geographical Survey of the Territories
1:507k
1870
Dietrich Reimer
1:3m
1882
Cram, George Franklin
1:2m
1875
Cram Atlas Company
1:1m
1938
Thomas Brothers
U.S. General Land Office
Rand McNally and Company
