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Submitted on: 20 October 2008.
Revised on: 17 November 2008.
Accepted on: 06 January 2009.
___________________GEOTECHNICAL TESTING JOURNAL---AMER SOC TESTING MATERIALS
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Submitted on: 02 May 2006.
Revised on: 18 July 2006.
Accepted on: 08 September 2006.
___________________GEOTECHNICAL TESTING JOURNAL---AMER SOC TESTING MATERIALS