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Submitted on: 09 March 2002.
Revised on: 10 April 2002.
Accepted on: 17 May 2002.
___________________GIST-Education and Learning Research Journal
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Submitted on: 21 October 2014.
Revised on: 11 December 2014.
Accepted on: 07 January 2015.
___________________GIST-Education and Learning Research Journal
Submitted on: 20 July 2006.
Revised on: 27 October 2006.
Accepted on: 21 December 2006.
___________________GIST-Education and Learning Research Journal
Submitted on: 16 June 2024.
Revised on: 11 September 2024.
Accepted on: 23 October 2024.
___________________GIST-Education and Learning Research Journal
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Submitted on: 30 July 2022.
Revised on: 03 September 2022.
Accepted on: 29 September 2022.
___________________GIST-Education and Learning Research Journal
Submitted on: 12 August 2004.
Revised on: 09 November 2004.
Accepted on: 10 December 2004.
___________________GIST-Education and Learning Research Journal
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