2d United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, Sept. 1-13, 1958; [papers], U. S. A., June 1958, A/CONF.15/P/ (series). 1425. X-ray spectroscopy of rare-earth elements [with bibliography; by] F. W. Lytle, K. R. Stever, and H. H. Heady.

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