1. Article 1. Section 2, of the United States Constitution.
2. U.S. Department of Commerce, Bureau of the Census, 200 Years of U.S. Census Taking: Population and Housing Questions, 1790–1990 (1989), p. 1.
3. Frederick G. Bohme,“U.S. Economic Censuses, 1810 to the Present,” Government Information Quarterly, 4 (1987): 224.
4. U.S. Department of Commerce, Bureau of the Census, 1979. Twenty Censuses: Population and Housing Questions 1790–1980 (1979), p. 14.
5. Ibid., p. 19.