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  1. Om de skalbærende molluskers : udbredningsforhold i de danske have indenfor Skagen / af C.G. Joh. Petersen.
    By: Petersen, C. G. Joh.
    Publication info: Kjøbenhavn :Høst,1888.
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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  2. On the biology of our flat-fishes and on the decrease of our flat-fish fisheries, with some observations showing how to remedy the latter and promote the flat-fish fisheries in our seas east of the Skaw.
    By: Petersen, C. G. Joh.
    Publication info: Kjøbenhavn :Centraltrykkeriet,1894.
    Contributed by: Smithsonian Libraries
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