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Submitted on: 01 March 2009.
Revised on: 07 June 2009.
Accepted on: 30 June 2009.
___________________Carbon Resources Conversion---KEAI PUBLISHING LTD
Submitted on: 03 March 1999.
Revised on: 22 June 1999.
Accepted on: 28 July 1999.
___________________Carbon Resources Conversion---KEAI PUBLISHING LTD
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