Note 432 — Chapter IX · HELIUM STARS WITH BRIGHT LINES.
Reading edition
Comptes Rendus, 11th Oct. 1897; Astroph. Journ. vol. vi. p. 322; Atlas of Spectra, p. 138.
Reading edition
Comptes Rendus, 11th Oct. 1897; Astroph. Journ. vol. vi. p. 322; Atlas of Spectra, p. 138.