Number | Name | Date | Kind |
---|---|---|---|
3193351 | Miller et al. | Jul 1965 | |
3353928 | Woyski et al. | Nov 1967 | |
3375061 | Healy et al. | Mar 1968 | |
4051219 | Hafner | Sep 1977 |
Entry |
---|
H. E. Kremers, "The Rare Earth Industry", Journal of the Electrochemical Society, vol. 96, pp. 152-157 (1949). |
V. E. Shaw, "Extraction of Rare-Earth Elements from Bastnaesite Concentrate", U.S. Bureau of Mines Report of Investifations 5474 (1959). |
Phosphoric Acid, vol. 1, Part II, A. V. Slack, ed., Marcel Decker, Inc., New York (1968), pp. 696-702, and 708. |