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Submitted on: 15 July 2018.
Revised on: 23 August 2018.
Accepted on: 30 September 2018.
___________________GEOSYNTHETICS INTERNATIONAL---EMERALD GROUP PUBLISHING LTD
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Submitted on: 12 September 1999.
Revised on: 17 December 1999.
Accepted on: 12 January 2000.
___________________GEOSYNTHETICS INTERNATIONAL---EMERALD GROUP PUBLISHING LTD
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