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  1. Deutschlands Hydrachniden /
    By: Piersig, R.
    Publication info: Stuttgart :E. Nägele,1897-1900.
    Holding Institution: Smithsonian Libraries
    Subjects: Germany  Hydrachnidae  Mites  
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  2. Hydrachnae, quas in acquis Daniae palustribus
    By: Müller, Otto Frederik,
    Publication info: Lipsiae,apud Siegfried Lebrecht Crusium,1781.
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Denmark  Hydrachnidae  Mites  
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  3. Hydrachnidae und Halacaridae,
    By: Piersig, Gustav Richard, - Lohmann, Hans,
    Publication info: Berlin,R. Friedländer und Sohn,1901.
    Holding Institution: MBLWHOI Library
    Subjects: Hydrachnidae  
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  4. Om Sveriges hydrachnider /
    By: Neuman, Carl Julius,
    Publication info: Stockholm :Kongl. boktryckeriet, P.A. Norstedt & söner,1880.
    Holding Institution: Smithsonian Libraries
    Subjects: Hydrachnidae  Sweden  Water mites  
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