Annual mean values of geomagnetic components for selected observatories, 1940-73
Takeshi Yukutake, William I. Paddock, Joe Haskell Allen, United States. National Oceanic and Atmospheric Administration, Tōkyō Daigaku. Jishin Kenkyūjo, National Geophysical and Solar-Terrestrial Data Center, World Data Center A for Solid Earth Geophysics
Dept. of Commerce, National Oceanic and Atmospheric Administration, [Office of Oceanic and Atmospheric Services], Environmental Data and Information Service, World Data Center A for Solid Earth Geophysics, 1979 - Science - 81 pages
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