Suggested citation and version history for


  Cole, Kenneth, 2008, Prehistoric packrats piled up clues 
       to climate Change:  U.S. Geological Survey Fact 
       Sheet 2008-3053, 2 p. 
       [http://pubs.usgs.gov/fs/2008/3053/].


  Version 1.0, June 24, 2008

  Initial release online at
  http://pubs.usgs.gov/fs/2008/3053/