"The Evolution of United States Agriculture As Related to Changes In Economic and Institutional Patterns." Address before the World Food Forum at the Centennial Observance of the U.S. Department of Agriculture, Washington, D.C., May 15, Box: Series 10, Box 78. Henry Agard Wallace Papers, MsC0177. University of Iowa Special Collections. https://aspace.lib.uiowa.edu/repositories/2/archival_objects/403736 Accessed May 05, 2024.