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Über die Klassenzahl imaginär-quadratischer Zahlkörper

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Correspondence to Trygve Nagel.

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Nagel, T. Über die Klassenzahl imaginär-quadratischer Zahlkörper. Abh.Math.Semin.Univ.Hambg. 1, 140–150 (1922). https://doi.org/10.1007/BF02940586

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