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- Ascherson, Paul Friedrich August & Graebner, Karl Otto Robert Peter Paul6
- Fiori, Adriano & Paoletti, Giulio4
- Loiseleur-Deslongchamps, Jean-Louis-Auguste3
- Reichenbach, Heinrich Gottlieb Ludwig3
- Schinz, Hans & Keller, Robert3
- Arcangeli, Giovanni2
- Caruel, Teodoro2
- Futák, Ján (ed.)2
- Gaudin, Jean-François-Aimé-Théophile-Philippe2
- Hooker, Joseph Dalton2
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