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Submitted on: 28 December 2008.
Revised on: 26 April 2009.
Accepted on: 09 June 2009.
___________________Journal of Groundwater Science and Engineering
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Submitted on: 19 September 2003.
Revised on: 04 January 2004.
Accepted on: 16 February 2004.
___________________Journal of Groundwater Science and Engineering
Submitted on: 17 January 2004.
Revised on: 13 April 2004.
Accepted on: 28 April 2004.
___________________Journal of Groundwater Science and Engineering