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2. T. G. Pearson “The Chemical Background of the Aluminum Industry”, pp. 17-35, Lectures, Monographs and Reports, No. 3, 1955, The Royal Institute of Chemistry
3. J. L. Kelly “A Study of the Influences of Bayer Process Impurities on the Crystallization of Alumina Trihydrate”, Ph.D. Dissertation, 1962, Louisiana State University
4. R. F. , Roberts , Jr. U.S. Patent 2,935,376, May 3, 1960
5. R. F. Roberts , Jr. R. H. Lister U.S. Patent 3,372,985, March 12, 1968