Dennis Gallegos, principal author and principal editor ; contributors, John Cook ... [and others] ; prepared by Westec Services, inc. ; prepared for U.S. Department of Interior, Bureau of Land Management ; Eric W. Ritter, general editor
David W. Layton ... [and others] ; Lawrence Livermore Laboratory in cooperation with the U.S. Department of Energy/San Francisco Operations Office, the U.S. Geological Survey, and the U.S. Bureau of Land Management