The solar Ca II plage index
By: by Wesley E. Swartz and Regan Overbeek
Contributors: Overbeek, Regan; Pennsylvania State University. Ionosphere Research Laboratory
Series: Ionospheric research -- 373(E); Ionospheric research scientific report -- no. 373(E)
Publisher: Pennsylvania State University, Ionosphere Research Laboratory
Published: 1971
Place of publication: University Park, Pa
Language: eng
Number of pages: 83
Subjects: Solar plages; Tables
Notes: Chiefly tables.

At head of title: Ionospheric research.

"8 October 1971."

"Sponsored by the National Aeronautics and Space Administration under Grant NGL 39-009-003."

Bibliography: p. 83.