Version history for Plouff, Donald, 2006, Geophysical studies of the Crump Geyser Known Geothermal Resource Area, Oregon, in 1975: U.S. Geological Survey Open-File Report 2006-1110 [available on the World Wide Web at URL http://pubs.usgs.gov/of/2006/1110/ ]. Version 1.0, May 23, 2006 Initial release online at http://pubs.usgs.gov/of/2006/1110/ Shapefile added May 9, 2008, by John Watson. Metadata added June 9, 2008.