1. Happey and Wormell, J. Soc. Dyers and Colourists, Symposium on Fibrous Proteins, 160 (May 1946).
2. Traill Chem. and Ind., 8, 58 (1945). Chibnall, Bailey and Astbury, U.K. Pat. 467,704.
3. Hewitt and Coleman, Proc. Roy. Soc., A, 190, 145 (1947).
4. Ward, High and Lundgren, J. Polymer Res., 1, 22 (1948).
5. Wormell, J. Tex. Inst., 39, P.T. 219 (1948).