1. G.R. Harrison, Wavelength Tables, M.I.T. Press, New York, 1939.
2. W. F. Meggers, C.H. Corliss, and B. F. Scribner, Tables of Spectral-Line Intensities, Parts I, II, N.B.S., 1961.
3. A.N. Zaidel et al., Tables of Spectrum Lines, Pergamon Press, New York, 1961.
4. R. L. Kelly, A Table of Emission Lines in the Vacuum Ultraviolet for All Elements, California, 1961.
5. C.E. Moore, A Multiplet Table of As trophysical Interest, Parts I, II, N.B.S., Washington, 1945.