Sunspot drawing of 1975-2-1

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https://doi.org/10.7891/e-manuscripta-98076



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1975-02-01
08:30
Hs 1304.5:5597
https://doi.org/10.7891/e-manuscripta-98076
Observer : Sergio Cortesi
Seeing (SIDC) : 2
No group