1. Topographic change detection at select archeological sites in Grand Canyon National Park, Arizona, 2006-2007 Author/Creator: Collins, Brian D. (Brian David) Publication/Creation: Reston, Va. : U.S. Geological Survey, 2009 Resource Type: Book Access & Availability: Loading
2. Topographic change detection at select archeological sites in Grand Canyon National Park, Arizona, 2007-2010 Author/Creator: Collins, Brian Daniel, author Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2012 Resource Type: Book Access & Availability: Loading