| Reference Label | Details |
|---|---|
| Moore 1970 | C. E. Moore, "Ionization Potentials and Ionization Limits Derived from Analyses of Optical Spectra", NSRDS-NBS 34, National Bureau of Standards: Washington, DC 1970 |
| est unc | estimated uncertainty |
| Kaufman 1969 | V. Kaufman and L. J. Radziemski Jr., J. opt. Soc. Amer. 59, 227-228 (1969) Redetermined Level Values and Interaction Parameters of S I and Cl II Ground Configurations |
| Edlen 1964 | B. Edlén, in: Spectroscopy I / Spektroskopie I, S. Flügge, Ed., Hand. Phys. Encycl. Phys. 5/27, 80-220 (1964); Springer: Berlin, Heidelberg 1964 Atomic Spectra |