Sunspot drawing of 1973-10-12

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https://doi.org/10.7891/e-manuscripta-97610



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1973-10-12
08:00
Hs 1304.5:5200
https://doi.org/10.7891/e-manuscripta-97610
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group