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Submitted on: 29 June 2017.
Revised on: 25 October 2017.
Accepted on: 24 December 2017.
___________________INTERNATIONAL REGIONAL SCIENCE REVIEW
Submitted on: 17 July 2001.
Revised on: 29 October 2001.
Accepted on: 23 November 2001.
___________________INTERNATIONAL REGIONAL SCIENCE REVIEW
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Submitted on: 11 December 2005.
Revised on: 24 February 2006.
Accepted on: 01 April 2006.
___________________INTERNATIONAL REGIONAL SCIENCE REVIEW
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Submitted on: 17 December 2015.
Revised on: 27 February 2016.
Accepted on: 12 March 2016.
___________________INTERNATIONAL REGIONAL SCIENCE REVIEW