1. G. Herzberg, Molecular Spectra and Molecular Structure, Vol. II, Infrared and Raman Spectra of Polyatomic Molecules, D. Van Nostrand Company, Inc., Princeton, New Jersey, 1945.
2. F. A. Cotton, Chemical Applications of Group Theory, Interscience Publishers, New York, 1963, Chapter 3.
3. Ibid., Chapter 9.
4. J. E. Rosenthal and G. M. Murphy, Rev. Mod. Phys. 8: 317 (1936).
5. A. G. Meister, F. F. Cleveland, and M. J. Murray, Am. J. Phys. 11: 239 (1943).