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AWT80 | J. A. Armstrong, J. J. Wynne, and F. S. Tomkins, J. Phys. B 13, L133 (1980). |
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M58 | C. E. Moore, Atomic Energy Levels, Natl. Bur. Stand. (U.S.) Circ. 467. Vol. III (1958); reprinted as Natl. Stand. Ref. Data Ser., Natl. Bur. Stand. (U.S.) 35 (1971). |
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R34a | E. Rasmussen, Z. Phys. 86, 24 (1934). |
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R34b | E. Rasmussen, Z. Phys. 87, 607 (1934). |
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