U.S. Geological Survey, Geologic Division, Office of Mineral Resources ; by Geoffrey S. Plumlee ... [and others] ; with contributions from S.D. Ludington .. [and others].
authors, Emma S. Bullock [and others] ; with John H. Betts [and others] ; editors, Jeff W. Harris and Gloria A. Staebler ; illustrators, Alisa Abrahamson [and others]