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  1. Notes about some in Finland found species of non-parasitical worms : (Turbellaria, Discophora, et Oligochaeta fennica) / by Axel R. Spoof.
    By: Spoof, Axel R[einhold],
    Publication info: Åbo :Printed for the author,1889.
    Contributed by: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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