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Bennett, Lola and Smith, Corinne. "Historic American Engineering Record Cotter Bridge (R.M. Ruthven Bridge)." 1988.History.Archived December 13, 2010, at the Wayback Machine Page 3. Retrieved August 20, 2010.
Ramey, Ann. "Cotter Historical Briefs." History.Archived January 15, 2011, at the Wayback Machine Retrieved August 20, 2010.
Bennett, Lola and Smith, Corinne. "Historic American Engineering Record Cotter Bridge (R.M. Ruthven Bridge)." 1988. History.Archived December 13, 2010, at the Wayback Machine Page 6. Retrieved August 20, 2010.
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McClelland, Frances Shiras (December 1982). History of Baxter County, Arkansas: from the beginning to 1939 (2nd printing ed.). Saint Louis University. p. 52. OCLC733695700.
Meriwether, Robert W. (1974). A Chronicle of Arkansas Newspapers Published Since 1922 and of the Arkansas Press Association, 1930-1972. Little Rock, Ark: Arkansas Press Association. p. 5. OCLC2146483.