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Submitted on: 07 August 2008.
Revised on: 12 November 2008.
Accepted on: 11 December 2008.
___________________Economia Sociedad y Territorio
Submitted on: 28 August 2011.
Revised on: 20 October 2011.
Accepted on: 22 November 2011.
___________________Economia Sociedad y Territorio
Submitted on: 26 March 2005.
Revised on: 30 April 2005.
Accepted on: 01 June 2005.
___________________Economia Sociedad y Territorio
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Submitted on: 09 August 2005.
Revised on: 04 December 2005.
Accepted on: 30 January 2006.
___________________Economia Sociedad y Territorio
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