Anderson, W.S., and Hooper, J.J.
American jack stock and mule production. Kentucky Agricultural Experiment Station, Bulletin 212: Lexington KY, 1917.
Bourke, John. On the border with Crook. Reprint, Lincoln: University of Nebraska Press, 1971.
Bradley, Melvin. The Missouri mule: his origin and times.
Two vol. Columbia, MO. Extension Division, University of Missouri-Columbia, 1993.
Chittenden, W.D. “Horses and mules for farm power.” Breeders Gazette
Danhof Clarence. Change in agriculture: The northern United States, 1820-1870. Cambridge: Harvard University Press, 1969.
Ellenburg, George. “African Americans, mules, and the southern mindscape, 1850-1950.” Agriculture History
Ewing, Floyd. “The mule as a factor in the development of the Southwest.” Arizona and the West
Fraser, Alexander. “The draft mule in the field in Mexico,” American veterinary medical association LII (1917):1273.
Garrett, Martin. “The mule in southern agriculture: a requiem.” The Journal of Economic History
Garrett, Martin. “Evidence on the use of oxen in the postbellum South.” Social Science History
Genevose, Eugene. The political economy of slavery: Studies in the economy and society of the slave south. New York: Pathenon Books, 1963
Gray, Lewis. History of agriculture in the southern United States to 1860. 2 vols. Gloucester: Peter Smith, 1958
Hood, J. “The mule.” American Farmer
Kauffman, Kyle. “Why was the mule used in southern agriculture?: Empirical evidence of principle-agent solutions.” Explorations in Economic History
Kirby, Jack. Rural worlds lost: the American south, 1920-1960. Baton Rouge: Louisiana State University Press, 1987.
Lamb, Robert. The mule in southern agriculture. Berkeley: Greenwood Press, 1963.
Liebowitz, Jonathan. “The presence of draft oxen in Western agriculture.” Material History Review
Moore, John. The emergence of the cotton kingdom in the old Southwest.
Baton Rouge: Louisiana State University Press, 1988.
Olsen, John. The occupational structure of plantation slave labor in the late antebellum era. Ph.D. diss., University of Rochester, 1983.
Ried, Joseph. “White land, black labor and agricultural stagnation. The causes and effects of sharecropping in the Postbellum South, Explorations in Economic History
The mule in southern agriculture. Missouri Historical Review
Shannon, Fred. The farmer's last frontier: Agriculture, 1860-1897. New York: Farrar and Rine-hart, Inc., 1945.
1820. Address to the agricultural society of Maryland. 2: (Oct.) 238-41.
Thornbury, William. Regional geomorphology of the United States. New York: John Wiley and Sons. 1965
U.S. Bureau of the Census. 1896. The Eleventh Census. Report on Farms and Homes: Proprietorship and Indebtedness in the United States.
U.S. Bureau of the Census. 1890. The Eleventh Census, Statistics of Agriculture. Washington, DC:
Government Printing Office.
U.S. Bureau of the Census. 1890. The Eleventh Census, Statistics of Population. Washington, DC: Government Printing Office.
Warder, J. T.
Mule raising, in U.S. Patent Office. Report of the Commissioner of Agriculture for the Year 1863. 38th Cong., 1st sess., H. Ex. Doc. 91. Washington: Serial no. 1196 180, 1864.
Welsch, J. “Defending oxen: A reassessment of their role in American agriculture, in exploring our livestock heritage.” Proceedings of the 1988 annual meeting of the American livestock breeds conservancy. Pittsboro, NC: The Conservancy:26–40.