Revision History for USGS Open-File Report 77-142

  R. Summers and J. Byerlee

  Summary of Results of Frictional Sliding Studies, 
  at Confining Pressures up to 6.98 Kb in Selected Rock 
  Materials

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  Posted online at http://pubs.usgs.gov/of/1977/0142/
  March 28, 2012

  Initial release in paper form
  October 1977

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