William C. Pollard, Jr., telephone interview with Jean Vorhees, Fredonia, Kans., Nov. 23, 1992; "History of the Area: Toronto Lake," U.S. Army Corps of Engineers website, [1][dead link] ; Gilmore, p. 1; Annette Allen, "Log fort Constructed Near Coyville," Fredonia Herald, March 8, 1961, p. 3.
Bill Linde and Linda Niemeyer, "Opothe Yahola," Woodson County, Kans., history website, "Archived copy". Archived from the original on 2011-06-28. Retrieved 2011-03-04.{{cite web}}: CS1 maint: archived copy as title (link) .
Bill Linde and Linda Niemeyer, "Opothe Yahola," Woodson County, Kans., history website, "Archived copy". Archived from the original on 2011-06-28. Retrieved 2011-03-04.{{cite web}}: CS1 maint: archived copy as title (link) .