Sunspot drawing of 1974-2-5

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https://doi.org/10.7891/e-manuscripta-97734



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1974-02-05
09:00
Hs 1304.5:5291
https://doi.org/10.7891/e-manuscripta-97734
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group