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  1. A preliminary list of the vascular flora of Allegheny County, Pennsylvania / by John A. Shaffer.
    By: Shafer, John Adolph,
    Publication info: Pittsburgh? :Carnegie Institute Museum?,1901?
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    Subjects: Allegheny County  Pennsylvania  Plants  
    BHL Collections: New York Botanical Garden
    View Book