Submitted on: 16 February 2002.
Revised on: 20 May 2002.
Accepted on: 05 June 2002.
___________________DADOS-REVISTA DE CIENCIAS SOCIAIS
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Submitted on: 02 June 2007.
Revised on: 27 September 2007.
Accepted on: 28 October 2007.
___________________DADOS-REVISTA DE CIENCIAS SOCIAIS
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Submitted on: 10 February 2008.
Revised on: 14 April 2008.
Accepted on: 23 May 2008.
___________________DADOS-REVISTA DE CIENCIAS SOCIAIS
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Submitted on: 09 May 1998.
Revised on: 09 July 1998.
Accepted on: 17 August 1998.
___________________DADOS-REVISTA DE CIENCIAS SOCIAIS