Powder River

1968

1:24k

Hells Half Acre

1968

1:24k

Midwest

1981

1:100k

Lysite

1982

1:100k

Arminto

1962

1:250k

Arminto

1958

1:250k

Arminto

1955

1:250k

Arminto

1955

1:250k

Economic map of portions of Wyoming, Idaho and Utah

1879

U.S. Geological and Geographical Survey of the Territories

1:507k

Yellowstone National Park, Big Horn Mountains and adjacent territory

1881

Heubach, Emil

1:750k