Sunspot drawing of 1964-10-21

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https://doi.org/10.7891/e-manuscripta-94049



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1964-10-21
08:15
Hs 1304.5:2428
https://doi.org/10.7891/e-manuscripta-94049
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group