1. Some Measurements of Ambient Air Pollution Arising from the Manufacture of Nitric Acid and Ammonium Nitrate Fertilizer;Harrison;Atmos. Envir.,1979
2. Vapor-Liquid Equilibrium Relationship for Ammonia in Presence of Other Gases;Reddy;Ind. Eng. Chem. Process Res. Dev.,1980
3. “Ammonia.” Subcommittee on Ammonia, Committee on Medical and Biologic Effects of Environmental Pollutants, National Research Council, University Park Press, Baltimore, 1979.
4. “Kirk-Othmer Encyclopedia of Chemical Technology,” 3rd ed., Vol. 2, p. 470, Wiley, New York, 1978.
5. Chem. Eng. News 74(26), 38–79, June 24 (1996), and earlier issues.