1. Herzberg, G., Molecular Spectra and Molecular Structure. 1. Spectra of Diatomic Molecules (D. Van Nostrand Co., Inc., New York, 1953).
2. Gaydon, A. G., Dissociation Energies (Chapman and Hall, Ltd., London, 1953).
3. Chupka, W. A., and Inghram, M. G., J. Chem. Phys., 21, 371 (1953); 59, 100 (1955).
4. Stull, D. R., and Sinke, G. C., Thermodynamic Properties of the Elements, Amer. Chem. Soc., Adv. Chem. Ser., No. 18 (1956).
5. JANAF Interim Thermochemical Tables, edit. by Stull, D. R. (Dow Chemical Co., Midland, Michigan, 1960).