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Submitted on: 29 November 2016.
Revised on: 03 January 2017.
Accepted on: 08 February 2017.
___________________Children & Schools---OXFORD UNIV PRESS
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Submitted on: 12 September 2011.
Revised on: 30 December 2011.
Accepted on: 25 February 2012.
___________________Children & Schools---OXFORD UNIV PRESS
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Submitted on: 30 December 1999.
Revised on: 06 February 2000.
Accepted on: 16 March 2000.
___________________Children & Schools---OXFORD UNIV PRESS