1. Roedel, M.J., U.S. Patent 2,377,753 (June 1945, to E.I. duPont de Nemours & Co.).
2. Brubaker, M.M., et al., U.S. Patent 2,497,291 (February 1950, to E.I. duPont de Nemours & Co.).
3. Hanford, W.E., and Roland, J.R., U.S. Patent 2,397,260 (March 1946, to E.I. duPont de Nemours & Co.).
4. Ford, T.A., U.S. Patent 2,468,954 (April 1949, to E.I. duPont de Nemours & Co.).
5. Compositional Relationships in the Copolymerization of Ethylene with Carbon Monoxide