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Denver, Colorado : U.S. Department of the Interior, National Park Service, Natural Resource Program Center, 2011.
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Denver, Colorado : U.S. Department of the Interior, National Park Service, Natural Resource Program Center, 2011.
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Jernigan, Johnathan W., author.
Fort Collins, Colorado : U.S. Department of the Interior, National Park Service, Natural Resource Stewardship and Science, 2012.
2012