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  1. Significance of white markings in birds of the order Passeriformes /
    By: Tracy, Henry Chester,
    Publication info: Berkeley :The University Press,1910.
    Holding Institution: Cornell University Library
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  2. Significance of white markings in birds of the order Passeriformes.
    By: Tracy, Henry Chester,
    Publication info: Berkeley,The University press(1910).
    Holding Institution: University of California Libraries (archive.org)
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