The problems of the A-type stars; Swings, Polydore ![]() in Observatory (The) (1942), 64 Detailed reference viewed: 10 (0 ULg) The origin of unidentified interstellar absorption linesSwings, Polydore ; in Observatory (The) (1939), 62 Detailed reference viewed: 3 (0 ULg) Forbidden FeIII-lines in celestial spectra; Swings, Polydore ![]() in Observatory (The) (1939), 62 Detailed reference viewed: 3 (0 ULg) |
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