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1 ta ish
Ish: Historical solar observations archive at the Ulugh Beg Astronomical Institute (Tashkent): catalogue of monthly averaged sunspot activity indices (1932–2000)
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Ishlab chiquvchilar uchun
1 ta ish
Ish: Historical solar observations archive at the Ulugh Beg Astronomical Institute (Tashkent): catalogue of monthly averaged sunspot activity indices (1932–2000)