Place: Iowa / Creator: Iowa. Department of Transportation.

Start Over Place Iowa Creator Iowa. Department of Transportation.

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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