1. Adams, M. D., Steunenberg, R. K., and Vogel, R. C., Argonne National Laboratory Report ANL-5796(1957)
2. Agron, P., Grenall, A., Kunin, R., and Weller, S., Paper 62 in “Chemistry of Uranium: Collected Papers,” Document TID-5290, p. 652. U. S. Atomic Energy Commission., Technical Information Service Extension, Oak Ridge, Tennessee, 1958
3. Precipitation of Uranium Tetrafluoride from Aqueous Solutions by Catalytic Reduction
4. S 51. The lower valency states of thorium