http://reply.papertrans.cn/2/103/10226/10226-11.png
http://reply.papertrans.cn/2/103/10226/10226-12.png
http://reply.papertrans.cn/2/103/10226/10226-13.png
http://reply.papertrans.cn/2/103/10226/10226-14.png
http://reply.papertrans.cn/2/103/10226/10226-15.png
Submitted on: 04 May 2014.
Revised on: 21 August 2014.
Accepted on: 23 September 2014.
___________________Frontiers in Sociology---FRONTIERS MEDIA SA
Submitted on: 08 September 2010.
Revised on: 07 October 2010.
Accepted on: 21 October 2010.
___________________Frontiers in Sociology---FRONTIERS MEDIA SA
http://reply.papertrans.cn/2/103/10226/10226-18.png
http://reply.papertrans.cn/2/103/10226/10226-19.png
Submitted on: 03 November 2001.
Revised on: 28 November 2001.
Accepted on: 13 December 2001.
___________________Frontiers in Sociology---FRONTIERS MEDIA SA