Creator: Iowa. Department of Transportation. / Provider: University of Iowa

Start Over Creator Iowa. Department of Transportation. Provider University of Iowa

1920. Iowa. Department of Transportation. color map.

1930. Iowa. Department of Transportation. color map.

1930. Iowa. Department of Transportation. color map.

1930. Iowa. Department of Transportation. color map.

1930. Iowa. Department of Transportation. color map.

1930. Iowa. Department of Transportation. color maps.

1940. Iowa. Department of Transportation. color maps.

1940. Iowa. Department of Transportation. color maps.

1940. Iowa. Department of Transportation. color maps.

1940. Iowa. Department of Transportation. color maps.

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