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Submitted on: 18 February 2010.
Revised on: 19 March 2010.
Accepted on: 17 May 2010.
___________________Areas-Revista Internacional de Ciencias Sociales
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Submitted on: 23 January 2004.
Revised on: 11 April 2004.
Accepted on: 01 June 2004.
___________________Areas-Revista Internacional de Ciencias Sociales
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Submitted on: 01 October 1998.
Revised on: 24 October 1998.
Accepted on: 28 November 1998.
___________________Areas-Revista Internacional de Ciencias Sociales
Submitted on: 29 December 2018.
Revised on: 02 April 2019.
Accepted on: 26 May 2019.
___________________Areas-Revista Internacional de Ciencias Sociales
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Submitted on: 04 March 1999.
Revised on: 22 May 1999.
Accepted on: 05 July 1999.
___________________Areas-Revista Internacional de Ciencias Sociales
Submitted on: 26 December 2018.
Revised on: 08 April 2019.
Accepted on: 27 May 2019.
___________________Areas-Revista Internacional de Ciencias Sociales