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3. National Research Council, “Fluorides.” Committee on Biologic Effects of Atmospheric Pollutants, Washington, DC, 1971.
4. “Air Pollution Control in the Primary Aluminum Industry.”;Singmaster,1973
5. Surinam: 62 Years of Bauxite Development, 12 Years of Alumina, Aluminum Production, Eng. and Mining J. 178, 75 (1977).