The photographic magnitude scale of the north polar sequence
By: by Frederick H. Seares ...
Series: Contributions from the Mount Wilson Observatory.; no. 70
Published: 1913
Place of publication: [Chicago
Language: eng
Number of pages: 27
Subjects: Stars -- Photographic measurements.
Notes: Cover-title.
At head of title: Carnegie Institution of Washington.
"Preprinted from the Astrophysical Journal, vol. XXXVIII, 1913."