___. Smith W. Brookhart and the Limitations of Senatorial Dissent. Annals of Iowa 48 (Summer/Fall 1985): 56-79.
___. Smith W. Brookhart and Russia. Annals of Iowa 42 (Winter 1975): 541-56.
Dennis, Alfred Pearce. The European Education of Senator Brookhart, along with the Senatorial Reply. In Gods and Little Fishes, pp. 26-83. Indianapolis: Bobbs-Merrill Co., 1931.
Johnston, Ray S. Smith Wildman Brookhart: Iowas Last Populist. Masters thesis, Iowa State Teachers College, 1964.
Luthin, Reinhard H. Smith Wildman Brookhart of Iowa: Insurgent Agrarian Politician. Agricultural History 25 (October 1951): 187-97.
McDaniel, George W. New Era Agrarian Radicalism: Smith W. Brookhart and the Populist Critique. Annals of Iowa 49 (Winter/Spring 1988): 208-20.
___. Prohibition Debate in Washington County, 1890-1894: Smith Wildman Brookharts Introduction to Politics. Annals of Iowa 45 (Winter 1981): 519-36.
___. The Republican Party in Iowa and the Defeat of Smith Wildman Brookhart, 1924-1926. Annals of Iowa 48 (Winter/Spring 1987): 413-34.
___. Smith Wildman Brookhart. Palimpsest 63 (November/December 1982): 175-83.
___. Smith Wildman Brookhart: Agrarian Radical in New Era America. Ph.D. dissertation, University of Iowa, 1985.
___. Smith Wildman Brookhart: Iowas Renegade Republican. Ames: Iowa State University Press, 1995.
___. Smith Wildman Brookhart: The Man Who Taught the Army How to Shoot. Palimpsest 75 (Spring 1994): 30-45.
Neprash, Jerry Alvin. The Brookhart Campaigns in Iowa, 1920-1926: A Study in the Motivation of Political Attitudes. 1932. Reprint. New York: AMS Press, 1968.
Russell, Barry Alexander. The Changing Concept of Iowa Progressivism: Smith W. Brookhart vs. Albert B. Cummins, 1920-1926. Masters thesis, University of North Carolina at Chapel Hill, 1973.