Interstellar calcium
By: by Otto Struve ...
Series: Contributions from the Mount Wilson Observatory.; no. 331
Published: 1927
Place of publication: [Chicago
Language: eng
Number of pages: 37
Subjects: Stars -- Spectra.; Calcium.
Notes: Cover-title.
At head of title: Carnegie Institution of Washington.
"Reprinted from the Astrophysical Journal, vol. LXV, 1927."