Version history and suggested citation:


  Schilling, S.P., Doelger, S., Scott, W.E., and Iverson, 
       R.M., 2008, Digital data for volcano hazards of the
       Three Sisters region, Oregon:  U.S. Geological Survey
       Open-File Report 2007-1221 
       [http://pubs.usgs.gov/of/2007/1221/].



  Version 1.0, August 8, 2008

  Initial release online at:  
  http://pubs.usgs.gov/of/2007/1221/