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Submitted on: 23 March 2003.
Revised on: 11 June 2003.
Accepted on: 28 June 2003.
___________________Journal of Geophysics and Engineering
Submitted on: 03 July 2002.
Revised on: 09 September 2002.
Accepted on: 18 October 2002.
___________________Journal of Geophysics and Engineering
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Submitted on: 28 April 2021.
Revised on: 20 July 2021.
Accepted on: 03 August 2021.
___________________Journal of Geophysics and Engineering
Submitted on: 25 October 2007.
Revised on: 16 November 2007.
Accepted on: 15 December 2007.
___________________Journal of Geophysics and Engineering
Submitted on: 30 March 2009.
Revised on: 20 May 2009.
Accepted on: 18 July 2009.
___________________Journal of Geophysics and Engineering