Revision History for USGS 
  Crustal Studies Technical Letter Number 3

  John C. Roller

  Times and Locations of Explosions; U.S. Geological Survey 1962 Field Season

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  Posted online at http://pubs.usgs.gov/misc/tl/0003/
  July 18, 2012

  Initial release in paper form
  October 5, 1962

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