Changes in the spectrographic elements of Y Sagitarii
By: by John C. Duncan ...
Series: Contributions from the Mount Wilson Observatory.; no. 248
Published: 1922
Place of publication: [Chicago
Language: eng
Subjects: Variable stars.; Stars -- Spectra.
Notes: Cover-title.
At head of title: Carnegie Institution of Washington.
"Reprinted from the Astrophysical Journal, vol. LVI, 1922."