Version history for: Buckingham, David A., DiFrancesco, Carl A., Porter, Kenneth E., Bleiwas, Donald I., Causey, J. Douglas, and Ferguson, William B., 2006, Idaho and Montana non-fuel exploration database 1980-1997: U.S. Geological Survey Data Series 173 [available on the World Wide Web at http://pubs.usgs.gov/ds/2006/173/ ]. Version 1.0, May 16, 2006 Initial release on online at http://pubs.usgs.gov/ds/2006/173/