Submitted on: 26 July 2008.
Revised on: 30 August 2008.
Accepted on: 16 September 2008.
SOCIETY & NATURAL RESOURCES---TAYLOR & FRANCIS INC
http://reply.papertrans.cn/3/283/28220/28220-32.png
Submitted on: 13 February 2003.
Revised on: 08 March 2003.
Accepted on: 31 March 2003.
SOCIETY & NATURAL RESOURCES
http://reply.papertrans.cn/3/283/28220/28220-34.png
Submitted on: 04 February 2005.
Revised on: 03 March 2005.
Accepted on: 12 March 2005.
SOCIETY & NATURAL RESOURCES
http://reply.papertrans.cn/3/283/28220/28220-36.png