Hudson, David; Marvin Bergman; Loren N. Horton (2008). The Biographical Dictionary of Iowa. Iowa City: Published for the State Historical Society of Iowa by the University of Iowa Press. pp. 107–109. ISBN9781587297243. OCLC296752419. Retrieved May 11, 2017 – via Google Books.
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Hudson, David; Marvin Bergman; Loren N. Horton (2008). The Biographical Dictionary of Iowa. Iowa City: Published for the State Historical Society of Iowa by the University of Iowa Press. pp. 107–109. ISBN9781587297243. OCLC296752419. Retrieved May 11, 2017 – via Google Books.