Photographic and photo-visual magnitudes of stars near the North pole.
Subtitle: A comparison of the Harvard and Mount Wilson scales of photographic magnitude.
By: By Frederick H. Seares ...
Series: Contributions from the Mount Wilson Observatory.; no. 97, 98
Published: 1915
Place of publication: [Chicago
Language: eng
Number of pages: 32
Subjects: Stars -- Photographic measurements.
Notes: Cover-title.
At head of title: Carnegie Institution of Washington.
"Reprinted from the Astrophysical Journal, vol. XLI, 1915."