Observations of the nebular lines in the spectrum of the long-period variable star R Aquarii
By: by Paul W. Merrill ...
Series: Contributions from the Mount Wilson Observatory.; no. 206
Published: 1921
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. LIII, 1921."