Characteristics of the U.S. population by farm and nonfarm origin - Beale, Calvin L. (Calvin Lunsford), 1923-2008.; Hudson, John C.; Banks, Vera J. (Washington : U.S. Dept. of Agriculture, Economic Research Service, Economic and Statistical Analysis Division, 1964)
Bibliography: p. 23-24.
Keywords: United States -- Population; Rural-urban migration -- United States