The variations in spectral type of twenty Cepheid variables
By: by Harlow Shapley ...
Series: Contributions from the Mount Wilson Solar Observatory,; no. 124
Published: 1916
Place of publication: [Chicago
Language: eng
Number of pages: 19
Subjects: Stars -- Spectra.; Variable stars.
Notes: Cover-title.
At head of title: Carnegie Institution of Washington.
"Reprinted from the Astrophysical Journal, vol. XLIV, 1916."