Search Results for the EPA National Library Catalog

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Your Search: (SUBJECT=Biotic communities Pennsylvania)

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Select Item	Title	Year Published
1	Level III and IV ecoregions of Pennsylvania and the Blue Ridge Mountains, ridge and valley, and central Appalachians of EPA region 3	1995
2	Level III and IV ecoregions of Pennsylvania and the Blue Ridge Mountains, the central Appalachian Ridge and valley, and the central Appalachians of Virginia, West Virginia, and Maryland /	1996

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