Sunspot drawing of 1977-4-5

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https://doi.org/10.7891/e-manuscripta-98603



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1977-04-05
07:00
Hs 1304.5:6258
https://doi.org/10.7891/e-manuscripta-98603
Observer : Araldo Pittini
Seeing (SIDC) : 3
No group