Spectrum of the iron star XX Ophiuchi
By: by Paul W. Merrill ...
Series: Contributions from the Mount Wilson Observatory.; no. 444
Published: 1932
Place of publication: [Chicago
Language: eng
Number of pages: 14
Subjects: Stars -- Spectra.; Variable stars.
Notes: Cover-title.
At head of title: Carnegie Institution of Washington.
"Reprinted from the Astrophysical Journal, vol. LXXV, 1932."