Sunspot drawing of 1963-12-28

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https://doi.org/10.7891/e-manuscripta-93773



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1963-12-28
08:45
Hs 1304.5:2168
https://doi.org/10.7891/e-manuscripta-93773
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group