Suggested citation and version history for


  Causey, J. Douglas, 2007, revised 2008, Mining claim 
       activity on federal land in the United States:  U.S. 
       Geological Survey Data Series 290, v. 1.1 
       [http://pubs.usgs.gov/ds/2007/290/].


  Version 1.1, April 25, 2008

  Updated and expanded the .zip data package for Nevada


  Version 1.0, November 20, 2007

  Initial release online at
  http://pubs.usgs.gov/ds/2007/290/