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Submitted on: 19 April 1999.
Revised on: 03 May 1999.
Accepted on: 13 May 1999.
RESEARCH IN SCIENCE EDUCATION---SPRINGER
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Submitted on: 09 October 2000.
Revised on: 30 October 2000.
Accepted on: 25 November 2000.
RESEARCH IN SCIENCE EDUCATION---SPRINGER
Submitted on: 22 November 2019.
Revised on: 13 December 2019.
Accepted on: 02 January 2020.
RESEARCH IN SCIENCE EDUCATION
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