Solnechnai͡a aktivnostʹ.
Series: Populi͡arnye lekt͡sii po astronomii ;; vyp.15
Publisher: "Nauka"
Published: 1969
Place of publication: Moskva
Language: rus
Number of pages: 92
Subjects: Solar activity.
Notes: At head of title: I͡U. I. Vitinskiĭ.