Ecoregions of western Washington and Oregon [cartographic material] / USGS ... [et al.] ; principal authors, David E. Pater ... [et al.].
Includes text, bibliographical references, 31 photographs, and location map of Level III ecoregions of the conterminous United States. Verso includes Summary table: Characteristics of ecoregions of western Washington and Oregon; and bibliographical references. This project was partially supported by funds from the USEPA - Office of Research and Development - Regional Applied Research Effort (RARE) program. [It] is associated with an interagency effort to develop a common framework of ecological regions. "Washington State Department of Natural Resources, Oregon Natural Heritage Program, Washington State Department of Ecology, EPA, USDA Natural Resources Conservation Service, USGS, U S Department of Agriculture Forest Service."
- U.S. Geological Survey ;
- Held by
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