World days
By: by A. H. Shapley
Series: IQSY instruction manual -- no. 1
Publisher: IQSY Secretariat
Published: 1963
Place of publication: London, England
Language: eng
Number of pages: 39
Subjects: International Years of the Quiet Sun, 1964-1965
Notes: At head of cover title: International Council of Scientific Unions, Comité international de géophysique.