1. W. M. King, P. A. Cantor, L. W. Schoellenbach, and C. R. Cannon, Applied Polymer Symposia, 13, 17 (1970).
2. Burns and Roe Construction Corp., Report to Office of Saline Water, February, 1971.
3. A. Gollan, Hydronautics, Inc., private communication. See also the paper by A. Gollan and M. P. Tulin in this volume.
4. H. K. Lonsdale, in Desalination by Reverse Osmosis U. Merten (Ed.), The MIT Press, Cambridge, Massachusetts (1966).
5. G. J. Gittens, P. A. Hitchcock, D. C. Sammon, and G. E. Wakley, Desalination, 8, 369 (1970).