Heliographic maps of the photosphere for the year 1973
By: by M. Waldmeier.
Series: Publikationen der Eidgenössischen Sternwarte Zürich ; Bd. 14, Heft 3; Publikationen der Eidgenössischen Sternwarte in Zürich ;; Bd. 14, Heft 3.
Publisher: Eidgenössische Sternwarte
Published: 1974
Place of publication: Zürich
Language: eng
Number of pages: 93
Subjects: Sunspots -- Charts, diagrams, etc.; Spectroheliograph.; Solar photosphere -- Charts, diagrams, etc.
Notes: Cover title.