1. Barrer, R. M., Diffusion In and Through Solids, Chaps. 9 and 10 (Camb. Univ. Press, London, 1951).
2. Kammermeyer, K., Technique of Organic Chemistry, 3, Part 1, 37 (Interscience, New York, 1956).
3. Choo, C. Y., Advances in Petroleum Chemistry and Refining, 6, Chapter 2 (Interscience, New York, 1962).
4. Brown, W. E., and Tuwiner, S. B., Diffusion and Membrane Technology, Chap. 12 (Reinhold, New York, 1962).
5. Sourirajan, S., Indust. Eng. Chem. Fundamentals, 2, 51 (1963).