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  1. Caroli lib. bar. de Geer ... Genera et species insectorum /
    By: De Geer, Charles, friherre, - Retzius, Anders Jåhan,
    Publication info: Lipsiae :Apud Siegfried Lebrecht Crusium,1783.
    Holding Institution: NCSU Libraries (archive.org)
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  2. Genera et species insectorum e generosissimi auctoris scriptis /
    By: De Geer, Charles, friherre, - Retzius, Anders Jåhan,
    Publication info: Lipsiae :Apud Sigfried Lebrecht Crusium,1783.
    Holding Institution: Smithsonian Libraries
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  3. Memoires pour servir a l'histoire des insectes /
    By: De Geer, Charles, friherre, - Bergquist, Karl Erik,
    Publication info: Stockholm :L.L. Grefing,1752-1778.
    Holding Institution: Smithsonian Libraries
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