Sunspot drawing of 1965-7-21

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https://doi.org/10.7891/e-manuscripta-94512



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1965-07-21
07:15
Hs 1304.5:2659
https://doi.org/10.7891/e-manuscripta-94512
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group