Meggers, William F.; Corliss, Charles H. & Scribner, Bourdon F. Tables of Spectral-Line Intensities: Part 2 - Arranged by Wavelengths, report, May 1975; (https://digital.library.unt.edu/ark:/67531/metadc13184/m1/1/: accessed April 16, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .