1. Herrman, W. O., and Haehnel, W., U.S. Patent 1,672,156 (1928) (to Wacker Chimie).
2. Ave, H., and Ono, Y., U.S. Patent 3,084,989 (1963) (to Kuraray and Air Products).
3. “Vinol” Product Handbook, Air Products and Chemicals, Inc., Allentown PA 1980.
4. Monograph;RK Tubbs,1968
5. Peirerls, E. S., Mod. Plast., 18(6) (1941).