Sunspot drawing of 1976-10-31

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https://doi.org/10.7891/e-manuscripta-98435



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1976-10-31
10:30
Hs 1304.5:6140
https://doi.org/10.7891/e-manuscripta-98435
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group