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Submitted on: 12 August 2004.
Revised on: 03 November 2004.
Accepted on: 14 November 2004.
___________________Geography and Sustainability---ELSEVIER
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Submitted on: 12 July 2019.
Revised on: 30 August 2019.
Accepted on: 28 October 2019.
___________________Geography and Sustainability---ELSEVIER
Submitted on: 24 September 2004.
Revised on: 18 November 2004.
Accepted on: 03 January 2005.
___________________Geography and Sustainability---ELSEVIER
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