Revision History for USGS 
  Scientific Investigations Report 2012-5133

  Brian D. Collins, Skye C. Corbett, Helen C. Fairley, 
  Diane Minasian, Robert Kayen, Timothy P. Dealy, and 
  David R. Bedford

  Topographic Change Detection at Select Archeological 
  Sites in Grand Canyon National Park, Arizona, 2007-2010

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  Posted online at http://pubs.usgs.gov/sir/2012/5133/
  July 26, 2012

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