1. Nucl. News 12, 9 (1969); 14, 29(1971).
2. The Wall Street Journal, Wed., June 3 (1970).
3. FORATOM study, A European Enrichment Plant, Nucl. Eng. Int. 14, 343 (1969).
4. M. Bogaardt and F. H. Theyse, Prob. Separation Uranium Isotopes, Turin, Italy Oct. 1–2 (1968).