The Rayton short-focus spectrographic objective
By: by Milton L. Humason ...
Series: Contributions from the Mount Wilson Observatory.; no. 400
Published: 1930
Place of publication: [Chicago
Language: eng
Subjects: Lenses.; Spectrograph.; Spectrum analysis.
Notes: Cover-title.
At head of title: Carnegie Institution of Washington.
"Reprinted from the Astrophysical Journal, vol. LXXI, 1930."