↑(en) History of Hardin County, Iowa, Together with Sketches of Its Towns, Villages and Townships, Educational, Civil, Military and Political History; Portraits of Prominent Persons, and Biographies of Representative Citizens : History of Iowa, Embracing Accounts of the Prehistoric Races, and a Brief Review of Its Civil, Political and Military History, vol. 1, Union Publishing Company, , 984 p., p. 656.
↑(en) William J. Moir, Past and Present of Hardin County, Iowa, Unigraphic, , 1051 p., p. 291.