Revision History for USGS 
  Crustal Studies Technical Letter Number 1

  Jerry P. Eaton


  The Parkfield-Cholame, California, Earthquakes of June-
  August, 1966: Instrumental Seismic Studies


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  Posted online at http://pubs.usgs.gov/misc/tl/0001/
  July 18, 2012

  Initial release in paper form
  February 1967

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