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Submitted on: 21 January 2002.
Revised on: 18 April 2002.
Accepted on: 20 May 2002.
___________________BIRD STUDY---TAYLOR & FRANCIS LTD
Submitted on: 16 August 2020.
Revised on: 30 September 2020.
Accepted on: 05 November 2020.
___________________BIRD STUDY---TAYLOR & FRANCIS LTD
Submitted on: 02 October 2011.
Revised on: 11 November 2011.
Accepted on: 09 December 2011.
___________________BIRD STUDY---TAYLOR & FRANCIS LTD
Submitted on: 25 October 2007.
Revised on: 05 January 2008.
Accepted on: 17 January 2008.
___________________BIRD STUDY---TAYLOR & FRANCIS LTD
Submitted on: 19 October 2015.
Revised on: 01 December 2015.
Accepted on: 16 December 2015.
___________________BIRD STUDY---TAYLOR & FRANCIS LTD