1. Alberti, F., Huber, K. P., Watson, J. K. G. 1984,J. molec. Spectrosc., (submitted).
2. Droege, A. T., Engelking, P. C. 1983,Chem. Phys. Lett.,96, 316.
3. D’Silva, A. P., Rice, G. W., Fassel, G. W. 1980,Appl. Spectrosc.,34, 578.
4. Gellene, G. I., Cleary, D. A., Porter, R. F. 1982,J. chem. Phys.,77, 3471.
5. Herzberg, G. 1945,Molecular Spectra and Molecular Structure II. Infrared and Raman Spectra of Polyatomic Molecules, D. Van Nostrand, New York.