Sunspot influences.
Published: 1938
Place of publication: (Ottawa)
Language: eng
Number of pages: 50
Subjects: Sunspots.
Notes: "Reprinted from the Journal of the Royal Astronomical Society of Canada, part I, March 1938 (and) part II, April 1938."

Stamped on cover: "Dom(inion) Obs(ervatory) Reprint no. 32."

Bibliographical footnotes.