Solar Physics · 1992 · 31 citations · 3 references
Natural SciencesAstronomyPhysicsAstrophysicsAtmospheric ScienceSolar Active RegionsSolar CycleSolar PhysicsSolar RadiationDensity Probability Distribution FunctionSunspot FormationSunspot Number
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The sunspot-activity in the years 1610–1960
C. W. Allen · Planetary and Space Science · 1962 · 291 citations