Submitted on: 29 May 2013.
Revised on: 10 July 2013.
Accepted on: 20 July 2013.
QUEST
Submitted on: 24 October 2015.
Revised on: 06 November 2015.
Accepted on: 12 November 2015.
QUEST
Submitted on: 19 September 2003.
Revised on: 19 October 2003.
Accepted on: 28 October 2003.
QUEST---ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
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Submitted on: 25 April 1998.
Revised on: 02 May 1998.
Accepted on: 08 May 1998.
QUEST---ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
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http://reply.papertrans.cn/3/260/25980/25980-27.png
Submitted on: 27 May 2008.
Revised on: 27 June 2008.
Accepted on: 03 July 2008.
QUEST---ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
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