The color-curve of XZ Cygni
By: by Martha Betz Shapley ...
Series: Contributions from the Mount Wilson Solar Observatory.; no. 128
Published: 1917
Place of publication: [Chicago
Language: eng
Subjects: Variable stars.
Notes: Cover-title.
At head of title: Carnegie Institution of Washington.
"Reprinted from the Astrophysical Journal, vol. XLV, 1917."