On the changes in the spectrum, period, and light-curve of the Cepheid variable R R Lyrae
By: by Harlow Shapley ...
Series: Contributions from the Mount Wilson Solar Observatory.; no. 112
Published: 1916
Place of publication: [Chicago
Language: eng
Number of pages: 17
Subjects: Variable stars.
Notes: Cover-title.
At head of title: Carnegie Institution of Washington.
"Reprinted from the Astrophysical Journal, vol. XLIII, 1916."