Suggested citation and version history for


  Thompson, Eric M., 2007, Surface-source downhole seismic 
       analysis in R:  U.S. Geological Survey Open-File 
       Report 2007-1124, 14 p. 
       [http://pubs.usgs.gov/of/2007/1124/].


  Version 1.0, January 15, 2009

  Initial release online at
  http://pubs.usgs.gov/of/2007/1124/