1. Anonymous, 1962: Air pollution measurements of the National Air Sampling Network. U.S. Public Health Service, Public Health Report 1957–1961.
2. Anonymous, 1969: Air quality criteria for sulfur oxides. Consumer Protection and Environmental Health Service, Natl. Air Pollution Control Administration. U.S. Dept. Health, Education and Welfare, Public Health Service, Washington, D.C.
3. Anonymous, 1969: Reinhaltung der Luft in Nordrhein-Westfalen. Rept. Conference on Air Conservation in Düsseldorf, Oct. 13–17, 1969. Ministry of Labor and Welfare, Nordrhein-Westfalen, Germany.
4. Beeton, A. M., 1965: Eutrophication of the St. Lawrence Great Lakes. Limnology and Oceanography, 10(2), 240–254.
5. Beeton, A. M., and D. C. Chandler, 1963: St. Lawrence Great Lakes. In: Limnology in North America (D. G. Frey, ed.). Madison, Wisconsin: Univ. Wisconsin Press, pp. 535 to 558.