Winter use plans : supplemental draft environmental impact statement for the Yellowstone and Grand Teton national parks and John D. Rockefeller, Jr., Memorial Parkway
prepared by the U.S. Department of Interior, National Park Service in cooperation with the U.S. Forest Service ... [and others]
Other Title
Winter use plans : draft supplemental environmental impact statement, Yellowstone and Grand Teton national parks and the John D. Rockefeller, Jr., Memorial Parkway