Iowa Department of Transportation. Highway and Street Map of Clear Lake, Iowa(PDF) (Map). Clear Lake Iowa: Iowa Department of Transportation. Retrieved October 6, 2019.
Iowa Department of Transportation. Iowa Grain Facilities Rail Map(PDF) (Map). Iowa: Iowa Department of Transportation. Retrieved October 6, 2019.
secure.iowadot.gov
"Region 2 Transit". Iowa Department of Transportation. Retrieved October 6, 2019.