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  1. Anatomische Beschreibung eines Monströsen, sechsfüssigen Wasser-Frosches (Rana esculenta) / von Dr. I. van Deen.
    By: Deen, Isaac van,
    Publication info: Leiden,S. und J. Luchtmans,1838.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
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