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  1. Die craspedoten Medusen der Siboga-Expedition,
    By: Maas, Otto,
    Publication info: Leiden,Buchhandlung und druckerei vormals E.J. Brill,1905.
    Holding Institution: Smithsonian Libraries
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  2. Einführung in die Biologie,
    By: Maas, Otto, - Renner, Otto.
    Publication info: München,R. Oldenbourg,1912.
    Holding Institution: MBLWHOI Library
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  3. Einführung in die experimentelle Entwickelungsgeschichte (Entwickelungsmechanik) /
    By: Maas, Otto,
    Publication info: Wiesbaden :J.F. Bergmann,1903.
    Holding Institution: MBLWHOI Library
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  4. Japanische medusen.
    By: Maas, Otto,
    Publication info: München,1911
    Holding Institution: MBLWHOI Library
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  5. Die medusen / von Otto Maas.
    By: Maas, Otto,
    Publication info: Cambridge :Printed for the Museum,1897.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
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  6. Meduses provenant des campagnes des yachts Hirondelle et Princesse-Alice ...
    By: Maas, Otto,
    Publication info: Monaco,1904.
    Holding Institution: Smithsonian Libraries
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  7. Die scyphomedusen der Siboga-expedition,
    By: Maas, Otto,
    Publication info: Leiden,Buchhandlung und druckerei vormals E. J. Brill,1903.
    Holding Institution: Smithsonian Libraries
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