Photographic investigations of faint nebulae
By: by Edwin P. Hubble.
Series: Publications of the Yerkes Observatory -- v. 4, pt. 2; Publications of the Yerkes Observatory of the University of Chicago -- v. 4, pt. 2.
Publisher: The University of Chicago Press
Published: 1920
Place of publication: Chicago, Ill
Language: eng
Number of pages: 17
Subjects: Nebulae.