1. National Academy of Sciences, Rapid Population Growth (Johns Hopkins Press, Baltimore, 1971), vols. 1 and 2.
2. Freedman R., Berelson B., Sci. Am. 231, 30 (Sept. 1974).
3. Coale A. J. ibid. p. 40.
4. The Limitation of Human Population: A Natural History
5. President’s Science Advisory Committee, Report of the Panel on the World Food Supply (The White House, Washington, D.C., 1967), vols. 1–3.