1. Von Wartenberg, H., Nachr. Ges. Wiss. Göttingen (Math. Phys. Klasse), 57 (1946); Z. Anorg. Allgem. Chem., 258, 356 (1949).
2. Selected Values of Chemical Thermodynamic Data”, Circular 500 of the U.S. National Bureau of Standards, Washington (1952).
3. cf. Values listed by Bichowsky, F. R., and Rossini, F. D., “Thermochemistry of Chemical Substances” (Reinhold, New York, 1936).
4. Smith, L., et al., Acta Chem. Scand., 7, 65 (1953).
5. Lacher, J. R., et al., J. Amer. Chem. Soc., 71, 1330 (1949).