Magnetic observations of sunspots, 1917-1924 ... b̀y  George E. Hale ànd  Seth B. Nicholson.
Contributors: Nicholson, Seth Barnes, 1891-,
Series: Carnegie institution of Washington.  Publication no. 498, pt. 1-2; Mount Wilson Observatory. Papers -- v. 5, pt. 1-2; Carnegie Institution of Washington publication -- 498, pt. 1-2; Papers of the Mount Wilson Observatory -- v. 5, pt. 1-2
Publisher: Carnegie institution of Washington
Published: 1938
Place of publication: Washington, D.C
Language: eng
Subjects: Sunspots.