Tromholt, Sophus
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Aurorae Borealis Studia Classica Vol. 1 (2016): Sophus Tromholt: Catalog der in Norwegen bis Juni 1878 beobachteten Nordlichter (1902) - Facsimiles
Catalog der in Norwegen bis Juni 1878 beobachteten Nordlichter
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Aurorae Borealis Studia Classica Vol. 2 (2016): Sophus Tromholt: Om Nordlysets Perioder / Sur les périodes de l'aurore boréale (1882) - Facsimiles
Om Nordlysets Perioder / Sur les périodes de l'aurore boréale
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Aurorae Borealis Studia Classica Vol. 6 (2017): Sophus Tromholt: Under Nordlysets Straaler (1885) / Under the Rays of the Aurora Borealis (1885) - Facsimiles
Under the Rays of the Aurora Borealis, vol. I
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Aurorae Borealis Studia Classica Vol. 6 (2017): Sophus Tromholt: Under Nordlysets Straaler (1885) / Under the Rays of the Aurora Borealis (1885) - Facsimiles
Under the Rays of the Aurora Borealis, vol. II
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Aurorae Borealis Studia Classica Vol. 6 (2017): Sophus Tromholt: Under Nordlysets Straaler (1885) / Under the Rays of the Aurora Borealis (1885) - Facsimiles
Under Nordlysets Straaler
Abstract PDF (Dansk)