Sunspot drawing of 1963-2-28

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https://doi.org/10.7891/e-manuscripta-93644



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1963-02-28
09:00
Hs 1304.5:1915
https://doi.org/10.7891/e-manuscripta-93644
Observer : Araldo Pittini
Seeing (SIDC) : 3
No group