Sunspot observations by Hisako Koyama: 1945–1996

Hayakawa, Hisashi ; Clette, Frédéric ; Horaguchi, Toshihiro ; Iju, Tomoya ; Knipp, Delores J ; Liu, Huixin ; Nakajima, Takashi

Monthly notices of the Royal Astronomical Society, 2020-03, Vol.492 (3), p.4513-4527 [Periódico revisado por pares]

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