Suggested citation and version history for


  Hopson, Clifford A., 2008, Geologic map of Mount St. 
       Helens, Washington prior to the 1980 eruption:  U.S. 
       Geological Survey Open-File Report 02-468, 2 sheets, 
       scale 1:31,250 
       [http://pubs.usgs.gov/of/2002/of02-468/].


  July 9, 2008, version 1.0

  Initial release online at
  http://pubs.usgs.gov/of/2002/of02-468/