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  1. Contributions toward the improvement of the culture of salmonoids and crawfish in smaller water-courses.
    By: Wozelka-Iglau, Karl. - Jacobson, Herman,
    Publication info: Washington,Govt. print. off.,1896.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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  2. Notes on fish-culture in Germany ...
    By: United States. - Jacobson, Herman, - Jaffé, Siegfried.
    Publication info: Washington,Govt. print. off.,1895.
    Contributed by: Library of Congress
    BHL Collections: Library of Congress
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