Sunspot drawing of 1974-1-27

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https://doi.org/10.7891/e-manuscripta-97884



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1974-01-27
15:00
Hs 1304.5:5288
https://doi.org/10.7891/e-manuscripta-97884
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group