^"U.S. 431, U.S. 280 Markers Now Up". The Opelika Daily News. Opelika, Alabama. January 26, 1954. p. 1. Retrieved December 21, 2019 – via Newspapers.com.
^Rand McNally (2016). "Tennessee" (Map). The Road Atlas (2016 Walmart ed.). c. 1:1,900,800. Chicago: Rand McNally. pp. 94–95. §§ A11–F11, F12–G12. ISBN0-528-00626-6.