Revision History for USGS Open-File Report 2009-1067

  Stephen Wessells, Jake Lowenstern, and Dina Venezky

  Three short videos by the Yellowstone Volcano Observatory

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  Added MP4 versions
  March 15, 2012

  Posted online at http://pubs.usgs.gov/of/2009/1067/
  December 29, 2009

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