1. J.R. Naegele, “Actinides and Some of their Alloys and Compounds,” Electronic Structure of Solids: Photoemission Spectra and Related Data, Landolt-Bornstein “Numerical Data and Functional Relationships in Science and Technology,” ed. A Goldmann, Group III, Volume 23b, Pages 183 – 327 (1994); and references therein.