Hamill

1971

1:24k

Hamill

1971

1:24k

Chamberlain

1986

1:100k

Chamberlain

1986

1:100k

Mitchell

1990

1:250k

Mitchell

1959

1:250k

Mitchell

1955

1:250k

Mitchell

1955

1:250k

Nebraska.

1948

Rand McNalley & Company

1:1m

South Dakota.

1927

Rand McNally and Company

1:2m