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Submitted on: 07 August 2002.
Revised on: 14 November 2002.
Accepted on: 08 December 2002.
___________________Chemistry Education Research and Practice
Submitted on: 05 May 2004.
Revised on: 10 August 2004.
Accepted on: 26 August 2004.
___________________Chemistry Education Research and Practice
Submitted on: 24 December 1999.
Revised on: 01 March 2000.
Accepted on: 07 April 2000.
___________________Chemistry Education Research and Practice
Submitted on: 26 February 2023.
Revised on: 25 May 2023.
Accepted on: 07 June 2023.
___________________Chemistry Education Research and Practice
Submitted on: 19 October 2012.
Revised on: 08 December 2012.
Accepted on: 04 February 2013.
___________________Chemistry Education Research and Practice