Suggested citation and version history for:  


  Collins, B.D., Minasian, D., and Kayen, R., 2009, 
       Topographic change detection at select archeological 
       sites in Grand Canyon National Park, Arizona, 
       2006-2007:  U.S. Geological Survey Scientific 
       Investigations Report 2009-5116, 58 p. 
       [http://pubs.usgs.gov/sir/2009/5116/]. 


  Version 1.0, June 16, 2009

  Initial release online at
  http://pubs.usgs.gov/sir/2009/5116/