Submitted on: 27 May 2003.
Revised on: 25 August 2003.
Accepted on: 15 October 2003.
___________________Environmental and Sustainability Indicators
http://reply.papertrans.cn/1/86/8594/8594-22.png
http://reply.papertrans.cn/1/86/8594/8594-23.png
Submitted on: 28 March 1999.
Revised on: 28 April 1999.
Accepted on: 24 May 1999.
___________________Environmental and Sustainability Indicators
Submitted on: 11 July 2002.
Revised on: 02 October 2002.
Accepted on: 13 November 2002.
___________________Environmental and Sustainability Indicators
http://reply.papertrans.cn/1/86/8594/8594-26.png
Submitted on: 07 August 2015.
Revised on: 28 August 2015.
Accepted on: 20 October 2015.
___________________Environmental and Sustainability Indicators
http://reply.papertrans.cn/1/86/8594/8594-28.png
Submitted on: 20 July 1999.
Revised on: 22 August 1999.
Accepted on: 12 October 1999.
___________________Environmental and Sustainability Indicators
Submitted on: 20 March 2015.
Revised on: 25 May 2015.
Accepted on: 23 July 2015.
___________________Environmental and Sustainability Indicators