Wisconsin Department of Transportation (March 14, 2006). "US 10/WIS 441 Expansion Study". Wisconsin Department of Transportation. Archived from the original on December 7, 2006. Retrieved December 29, 2006.
Wisconsin Department of Transportation (March 14, 2006). "US 10/WIS 441 Expansion Study". Wisconsin Department of Transportation. Archived from the original on December 7, 2006. Retrieved December 29, 2006.