Evolutionary charts of solar activity (calcium plages) as functions of heliographic longitude and time, 1964-1979 /
Hedeman, E. Ruth
Evolutionary charts of solar activity (calcium plages) as functions of heliographic longitude and time, 1964-1979 / E. Ruth Hedeman, Helen W. Dodson, Edmond C. Roelof. - Boulder, Colorado : U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Environmental Data and Information Service, World Data Center A for Solar-Terrestrial Physics, NOAA, 1981.
Report UAG, 81.
Evolutionary charts of solar activity (calcium plages) as functions of heliographic longitude and time, 1964-1979 / E. Ruth Hedeman, Helen W. Dodson, Edmond C. Roelof. - Boulder, Colorado : U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Environmental Data and Information Service, World Data Center A for Solar-Terrestrial Physics, NOAA, 1981.
Report UAG, 81.