The Henry Draper extension
Series: Annals of the Astronomical Observatory of Harvard College,; v. 100
Publisher: The Observatory
Published: 1925
Place of publication: Cambridge
Language: eng
Number of pages: 226
Subjects: Stars -- Catalogs.; Stars -- Spectra.
Genres: Catalogs.
Other titles: The Draper extension.
Notes: Issued in 6 pts.
Supplements the Henry Draper catalog (Annals, v. 91-99)