by Geoffrey S. Plumlee ... [and others] ; prepared by the U.S. Geological Survey and the Colorado Geological Survey in cooperation with the U.S. Bureau of Land Management
by A.A. Klingebiel ... [and others] ; in cooperation with U.S. Department of Agriculture, Soil Conservation Service and Forest Service, and U.S. Department of the Interior, U.S. Geological Survey and Bureau of Land Management