Sunspot drawing of 1964-5-12

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https://doi.org/10.7891/e-manuscripta-93945



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1964-05-12
07:15
Hs 1304.5:2272
https://doi.org/10.7891/e-manuscripta-93945
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group