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Submitted on: 30 April 2002.
Revised on: 30 June 2002.
Accepted on: 02 August 2002.
___________________Bibliotecas-Revista de la Escuela de Bibliotecologia Documentacion e Informacion
Submitted on: 13 January 2024.
Revised on: 22 February 2024.
Accepted on: 06 March 2024.
___________________Bibliotecas-Revista de la Escuela de Bibliotecologia Documentacion e Informacion
Submitted on: 04 April 2014.
Revised on: 27 May 2014.
Accepted on: 04 July 2014.
___________________Bibliotecas-Revista de la Escuela de Bibliotecologia Documentacion e Informacion