1. Ames Lab. Staff, Iowa State College, USAEC Rept. ISC508 (1954).
2. B. Love, WADD Tech. Rept., 60–864 (1961).
3. Am. Soc. Metals, Metals Handbook, v.I., 8 ed. (1961).
4. Rare Metals Handbook, 2 ed. (1961).
5. Table of Periodic Properties of the Elements (Dyna-Slide 1962, Sargent-Welch later).