1. E. Morrice, C. Wyche, and R. G. Knickerbocker: Electrowin-ning of Cerium. Paper presented at the February 1959 meeting of the AIME, San Francisco, Calif.
2. E. Morrice and R. G. Knickerbocker: Rare-Earth Electrolytic Metals. Paper presented at the November 1959 meeting of the ASM-AEC Symposium, Chicago, 111.
3. Journal of Metals (AIME): Editorial, vol. 11, (6), p. 363, June 1959.
4. A. Matthiessen: Annalen der Physik und Chemie, Leipzig, vol. 7, 1864, pp. 761, 892.
5. J. O. Linde: Annalen der Physik, vol. 10, 1931, p. 53; Ibid, vol. 14, 1932, p. 353; Ibid, vol. 15, 1932, p. 219.