Books by Zacharias, Otto (sorted alphabetically)
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- See also: de.wikipedia
- See also: en.wikipedia
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- Tier- und Pflanzenwelt des Süsswassers. Erster Band. (German) Wilhelm Weltner, Ludwig Plate, F. A. Forel, W. Migula, Friedrich Ludwig, August Gruber, and Julius Vosseler
- Tier- und Pflanzenwelt des Süsswassers. Zweiter Band. (German) Stephan Clessin, Arthur Seligo, Friedrich Zschokke, C. Apstein, Paul Kramer, E. Schmidt-Schwedt, and Friedrich Borcherding
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Displaying results 1–2