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  1. On the specific characters of the haddock (Gadus aeglefinus, Linn.), whiting (Gadus merlangus, Linn.); Gadus poutassou, Risso; Gadus argenteus, Guichenot; Gadus saida, Lepechin; Gadus ogac, Richardson; Gadus navaga, Kölreuter : with a key to the species of Gadus found in northern waters /
    By: Williamson, H. Charles.
    Publication info: Glasgow :Printed by James Hedderwick & Sons,1909.
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Libraries
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  2. The retardation of the development of the ova of the herring / by H.C. Williamson.
    By: Williamson, H. Charles.
    Publication info: London :H.M. Stationary Office,1911.
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Libraries
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