Grieve, Bill; Larson, Amanda; Brinkman, Dan (April 1, 2014). Illinois Route 176 Corridor(PDF) (Report). Gewalt Hamilton Associates. Archived from the original(PDF) on February 17, 2015. Retrieved May 25, 2015.
Grieve, Bill; Larson, Amanda; Brinkman, Dan (April 1, 2014). Illinois Route 176 Corridor(PDF) (Report). Gewalt Hamilton Associates. Archived from the original(PDF) on February 17, 2015. Retrieved May 25, 2015.