Submitted on: 01 February 2011.
Revised on: 02 March 2011.
Accepted on: 24 March 2011.
___________________Economia Agraria y Recursos Naturales
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Submitted on: 08 September 2004.
Revised on: 31 December 2004.
Accepted on: 13 February 2005.
___________________Economia Agraria y Recursos Naturales
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Submitted on: 10 December 2004.
Revised on: 14 March 2005.
Accepted on: 20 April 2005.
___________________Economia Agraria y Recursos Naturales
Submitted on: 25 February 2003.
Revised on: 27 May 2003.
Accepted on: 19 June 2003.
___________________Economia Agraria y Recursos Naturales
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Submitted on: 10 December 2019.
Revised on: 19 March 2020.
Accepted on: 09 May 2020.
___________________Economia Agraria y Recursos Naturales
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Submitted on: 11 December 2001.
Revised on: 02 January 2002.
Accepted on: 06 February 2002.
___________________Economia Agraria y Recursos Naturales