Sunspot drawing of 1975-10-30

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https://doi.org/10.7891/e-manuscripta-98246



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1975-10-30
07:45
Hs 1304.5:5826
https://doi.org/10.7891/e-manuscripta-98246
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group