References and Notes for Protactinium ( Pa )

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      BW92b     J. Blaise and J.-F. Wyart, Energy Levels and Atomic Spectra of Actinides, International Tables of Selected Constants 20, Paris (1992). Also available at http//www.lac.u.psud.fr/Database/Contents.html. 

      G67       A. Giachetti, J. Opt. Soc. Am. 57, 728 (1967). 

      S74       J. Sugar, J. Chem. Phys. 60, 4103 (1974). 

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