1. S. A. Digest, February 29, 1980.
2. J. B. See, “Developments in Chromium—1979,” Journal of Metals, 32(4) (1980, pp. 52–55.
3. R. J. Wicks, American Metal Market Chromium Supplement, December 17, 1981.
4. Johannesburg Consolidated Investment Company, Ltd., Annual Report, 1981.
5. R. H. Nafziger, P. E. Sanker and G. H. Reynolds, “Preparation of a Specialty Ferrochromium (9 wt%C) from a Domestic Chromite,” Journal of Metals, 32(3) (1980), pp. 49–52.