Sunspot drawing of 1961-12-12

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https://doi.org/10.7891/e-manuscripta-92688



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1961-12-12
13:00
Hs 1304.5:1531
https://doi.org/10.7891/e-manuscripta-92688
Observer : Sergio Cortesi
Seeing (SIDC) : 1
No group