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Submitted on: 24 November 2008.
Revised on: 01 December 2008.
Accepted on: 28 December 2008.
Quarterly Journal of Engineering Geology and Hydrogeology
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Submitted on: 30 November 2003.
Revised on: 06 January 2004.
Accepted on: 31 January 2004.
Quarterly Journal of Engineering Geology and Hydrogeology
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