Submitted on: 31 October 2008.
Revised on: 07 December 2008.
Accepted on: 13 December 2008.
Transcription-Austin---TAYLOR & FRANCIS INC
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Submitted on: 12 February 2003.
Revised on: 25 March 2003.
Accepted on: 18 April 2003.
Transcription-Austin---TAYLOR & FRANCIS INC
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