IGY Solar Activity Maps, Stonyhurst Sun Disk N°1-N°8, Annals of The International Geophysical Year. | ARC Archives Catalog
IGY Solar Activity Maps, Stonyhurst Sun Disk N°1-N°8, Annals of The International Geophysical Year.
National Academy of Sciences, "IGY Solar Activity Maps Stonyhurst Sun Disk N°1-N°8." Annals of the International Geophysical Year XXI.
ARC Archives Catalog