1. For general previews on the chemistry of polyamides, see: R. W. Lenz, Organic Chemistry of High Polymers ,Chap. 4, Wilcy-Interscience. New York (1967)
2. O. E. Snider and R. J. Richardson, Encyclopedia of Polymer Science and Technology ,Vol. 10, Wiley-Interscience, New York, 1969, p. 347
3. V. V. Korshak and T. M. Frunze. Synthetic Hetero Chain Polyamides, Israel Program for Scientific Translations. Jerusalem, Israel (1964)
4. P. W. Morgan, Condensation Polymers, Wiley-Interscience. New York (1965).
5. J. A. Sommers. Man-made Text. 32, 60 (1956).