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1Published 2009“...U.S. Department of the Interior, National Park Service, John Day Fossil Beds National Monument,...”
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2Published 2018“...John Day Fossil Beds, National Monument, National Park Service, US Department of the Interior,...”
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3Published 2001“...USDA Forest Service, Pacific Northwest Region, Umatilla National Forest, North Fork John Day Ranger...”
Government Document Microform Book