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http://reply.papertrans.cn/2/144/14375/14375-12.png
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Submitted on: 10 January 2007.
Revised on: 03 April 2007.
Accepted on: 20 April 2007.
___________________INTERNATIONAL REGIONAL SCIENCE REVIEW
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Submitted on: 03 March 2012.
Revised on: 02 April 2012.
Accepted on: 22 May 2012.
___________________INTERNATIONAL REGIONAL SCIENCE REVIEW
Submitted on: 05 February 2022.
Revised on: 07 May 2022.
Accepted on: 13 June 2022.
___________________INTERNATIONAL REGIONAL SCIENCE REVIEW
Submitted on: 29 March 2022.
Revised on: 13 July 2022.
Accepted on: 11 August 2022.
___________________INTERNATIONAL REGIONAL SCIENCE REVIEW
Submitted on: 21 December 2014.
Revised on: 14 March 2015.
Accepted on: 19 April 2015.
___________________INTERNATIONAL REGIONAL SCIENCE REVIEW