Version history for Davis, Philip A., 2004, Review of results and recommendations from the GCMRC 2000-2003 remote- sensing initiative for monitoring environmental resources within the Colorado River ecosystem: U.S. Geological Survey Open-File Report 2004-1206. Version 1.0, May 13, 2004 Intital release online at http://pubs.usgs.gov/of/2004/1206/