Submitted on: 31 July 1999.
Revised on: 16 September 1999.
Accepted on: 21 October 1999.
___________________Field Methods---SAGE PUBLICATIONS INC
Submitted on: 29 March 2002.
Revised on: 19 July 2002.
Accepted on: 17 September 2002.
___________________Field Methods---SAGE PUBLICATIONS INC
Submitted on: 13 November 2014.
Revised on: 23 February 2015.
Accepted on: 11 March 2015.
___________________Field Methods---SAGE PUBLICATIONS INC
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Submitted on: 12 October 2024.
Revised on: 12 November 2024.
Accepted on: 10 December 2024.
___________________Field Methods---SAGE PUBLICATIONS INC
Submitted on: 12 January 2000.
Revised on: 21 April 2000.
Accepted on: 15 May 2000.
___________________Field Methods---SAGE PUBLICATIONS INC
http://reply.papertrans.cn/1/98/9734/9734-27.png
Submitted on: 23 May 2001.
Revised on: 13 August 2001.
Accepted on: 11 October 2001.
___________________Field Methods---SAGE PUBLICATIONS INC
http://reply.papertrans.cn/1/98/9734/9734-29.png
Submitted on: 25 June 2008.
Revised on: 25 September 2008.
Accepted on: 01 November 2008.
___________________Field Methods---SAGE PUBLICATIONS INC