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Submitted on: 10 November 1998.
Revised on: 22 January 1999.
Accepted on: 20 March 1999.
___________________Environmental Technology & Innovation
Submitted on: 14 June 2006.
Revised on: 22 August 2006.
Accepted on: 10 September 2006.
___________________Environmental Technology & Innovation
Submitted on: 31 December 2012.
Revised on: 08 March 2013.
Accepted on: 22 April 2013.
___________________Environmental Technology & Innovation
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Submitted on: 30 August 2013.
Revised on: 12 November 2013.
Accepted on: 02 January 2014.
___________________Environmental Technology & Innovation
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