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Detailed Reference Information
Brunner 1938
Brunner, W. (1938). Provisional sunspot-numbers for May to July 1938. Terrestrial Magnetism and Atmospheric Electricity 43: doi: 10.1029/TE043i003p00326. issn: 0096-8013.
Journal
Terrestrial Magnetism and Atmospheric Electricity
Publisher
American Geophysical Union
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