Theobald, H. Rupert, ed. (1964). "Elections in Wisconsin". The Wisconsin Blue Book, 1964 (Report). State of Wisconsin. p. 770. Retrieved March 2, 2020.
Wisconsin Legislative Reference Bureau (1970). "Elections in Wisconsin". In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin Blue Book, 1970 (Report). Madison, Wisconsin: State of Wisconsin. p. 838. Retrieved March 2, 2020.
Wisconsin Legislative Reference Bureau (1975). "Elections in Wisconsin". In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1975 Blue Book (Report). Madison, Wisconsin: State of Wisconsin. p. 786. Retrieved March 2, 2020.
Wisconsin Legislative Reference Bureau (1981). "Elections in Wisconsin". In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1981-1982 Blue Book (Report). Madison, Wisconsin: State of Wisconsin. p. 868. Retrieved March 2, 2020.