Columbia Plateau (ecoregion) (English Wikipedia)
Analysis of information sources in references of the Wikipedia article "Columbia Plateau (ecoregion)" in English language version.
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archive.org
- Final Programmatic Environmental Impact Statement on Wind Energy Development on BLM-Administered Lands in the Western United States. United States Department of the Interior; Bureau of Land Management. p. 6. Retrieved October 24, 2018.
columbia plateau 32100.
usgs.gov
This article incorporates public domain material from Thorson, TD; Bryce, SA; Lammers, DA; et al. Ecoregions of Oregon (PDF). United States Geological Survey. (color poster with map, descriptive text, summary tables, and photographs; with a Reverse side).- This article incorporates public domain material from McGrath, CL; Woods, AJ; Omernik, JM; et al. Ecoregions of Idaho (PDF). United States Geological Survey. (color poster with map, descriptive text, summary tables, and photographs; with a Reverse side).
web.archive.org
- U.S. Environmental Protection Agency, Draft: Level III and IV Ecoregions of the Northwestern United States (PDF), archived from the original (PDF) on 2019-04-12 Cited for Washington information instead of an Ecoregions of Washington poster, which has not yet been located.