Revision History for USGS 
  Crustal Studies Technical Letter Number 32

  J.I. Pritchard

  A Final Report on Computed Magneto-Telluric Curves for 
  Hypothetical Models of Crustal Structure

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  Posted online at http://pubs.usgs.gov/misc/tl/0032/
  February 21, 2013

  Initial release in paper form
  April 2, 1965

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