1. E.H. Dix,Jr., “Aluminum Cap Piece on Washington Monument,” Metal Progress (Cleveland, OH: American Society For Metals, December 1934).
2. C. Winckler, “Aluminium,” Scientific American Supplement (142) (September 6, 1879), p. 3058.
3. H. Saint Clair Deville, De Aluminium, Mallet Bachellier, Imprimeur, Paris (1859).
4. J.D. Edwards, F.C. Frary, and Zay Jeffries, The Aluminum Industry, vol. 1 (New York: McGraw Hall, 1930), p. 3.
5. B.M. Conny, A Catalyst For Change (Golden, CO: Adolph Coors Co., 1990).