Sunspot numbers, 1610-1985
Subtitle: based on "The sunspot activity in the years 1610-1960"
By: revised by John A. McKinnon
Contributors: Waldmeier, Max; World Data Center A for Solar-Terrestrial Physics
Series: Report UAG -- 95
Publisher: World Data Center A for Solar-Terrestrial Physics
Published: 1987
Place of publication: Boulder, Colo
Language: eng
Number of pages: 112
Subjects: Sunspots; Tables
Other titles: Sunspot-activity in the years 1610-1960; Sunspot-activity in the years 1610-1960.
Notes: "January 1987."

"U.S. Government Printing Office: 1987-773-041/40001"--P. 112.