Sunspot drawing of 1977-3-1

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https://doi.org/10.7891/e-manuscripta-98889



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1977-03-01
08:00
Hs 1304.5:6231
https://doi.org/10.7891/e-manuscripta-98889
Observer : Sergio Cortesi
Seeing (SIDC) : 2
No group