The Henry Draper catalogue O>h, 1>h, 2>h, and 3>h
Series: Annals of the Astronomical Observatory of Harvard College -- v. 91
Publisher: The Observatory
Published: 1918
Place of publication: Cambridge, Mass
Language: eng
Number of pages: 289
Subjects: Stars; Catalogs; Spectra; Women astronomers; Astronomy; Research; Harvard College Observatory
Other titles: Draper catalogue.