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  1. A popular description of the common Oregon ferns; contribution from the Herbarium of the University of Oregon.
    By: University of Oregon. Herbarium. - Howell, Ruth M., - Kenworthy, Hannah Maude. - Sweetser, Albert R. (Albert Raddin), - Sweetser, Albert Raddin,
    Publication info: Salem, Or.,State Printing Dept.,1913.
    Holding Institution: Multiple institutions
    BHL Collections: Library of Congress
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