Revision History for USGS
  Scientific Investigations Map 3169

  Amy M. Mathie, Toby L. Welborn, David D. Susong, and 
  Mary L. Tumbusch

  Phreatophytic Land-Cover Map of the Northern and Central 
  Great Basin Ecoregion: California, Idaho, Nevada, Utah, 
  Oregon, and Wyoming

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  Posted online at http://pubs.usgs.gov/sim/3169/
  September 1, 2011

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