Double stars south of -30⁰, and of magnitude 6.3-7.0.
Series: Annals of the Astronomical Observatory of Harvard College -- v. 60, no. 7
Published: 1908
Language: eng
Number of pages: 198
Other titles: Miscellaneous researches made during the years 1906-1908
Notes: In Harvard College - Astronomical observatory. Annals, [1908?], LX.