Sunspot drawing of 1977-4-25

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https://doi.org/10.7891/e-manuscripta-98641



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1977-04-25
07:30
Hs 1304.5:6275
https://doi.org/10.7891/e-manuscripta-98641
Observer : Sergio Cortesi
Seeing (SIDC) : 2
No group