Sunspot drawing of 1961-12-13

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https://doi.org/10.7891/e-manuscripta-92795



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1961-12-13
08:30
Hs 1304.5:1532
https://doi.org/10.7891/e-manuscripta-92795
Observer : Araldo Pittini
Seeing (SIDC) : 3
No group