Submitted on: 26 June 2014.
Revised on: 08 September 2014.
Accepted on: 05 October 2014.
___________________Environmental and Sustainability Indicators
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Submitted on: 30 September 2019.
Revised on: 13 January 2020.
Accepted on: 05 March 2020.
___________________Environmental and Sustainability Indicators
Submitted on: 09 April 2004.
Revised on: 11 July 2004.
Accepted on: 29 July 2004.
___________________Environmental and Sustainability Indicators
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