01212oam 2200421 450 991070996020332120180829091725.0(CKB)5470000002474664(OCoLC)418043680(OCoLC)995470000002474664(EXLCZ)99547000000247466420090629d1960 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierOn the structure of the sunspot zone /by Barbara BellWashington, D.C. :Smithsonian Institution,1960.1 online resource (pages 17-28) illustrationsSmithsonian contributions to astrophysics ;volume 5, number 3SunspotsSunspotsfastSunspots.Sunspots.Bell Barbara1922-1388422Smithsonian Astrophysical Observatory,MUUMUUOCLCQOCLCOOCLCFOCLCQGPOBOOK9910709960203321On the structure of the sunspot zone3449363UNINA