Suggested citation and version history for


  Stoffer, Philip W., 2008, Geology of National Parks:  
       U.S. Geological Survey General Information Product 
       69, 1 ~24" x ~20" double-sided sheet 
       [http://pubs.usgs.gov/gip/69/].


  Version 1.0, July 1, 2008

  Initial release online at
  http://pubs.usgs.gov/gip/69/