United States. Works Progress Administration , Hobbs, S. H., Jr. (Samuel Huntington), 1895-1969 , Link, Irene and Winston, Ellen, 1903-1984. Plan for Cooperative Rural Research : Organization, Scope, Results, Series II, No. 17. Washington, DC: Works Progress Administration, Division of Social Research, 1938, https://fraser.stlouisfed.org/title/6733, accessed on August 6, 2024.