Sunspot drawing of 1964-10-13

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https://doi.org/10.7891/e-manuscripta-94121



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1964-10-13
09:00
Hs 1304.5:2421
https://doi.org/10.7891/e-manuscripta-94121
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group