1. D. W. Leonard, Preprint of Paper Presented at Soc. of Mining Engineers of A.I.M.E., Oct. 17–19, 1979, Tucson, Ariz.
2. R. M. Milton, in “Molecular Sieves”, Soc. Chem. Ind., London, (1968), p. 199.
3. D. W. Breck, “Zeolite Molecular Sieves”, Wiley-Interscience, New York, (1974).
4. R. M. Barrer, “Zeolites and Clay Minerals as Sorbents and Molecular Sieves”, Academic Press, London, (1978).
5. D. W. Breck, Proceedings of the Conference on The Properties and Applications of Zeolites, Soc. Chem Ind., London, April 18-20, 1979, to be published.