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Submitted on: 19 July 2003.
Revised on: 17 August 2003.
Accepted on: 16 October 2003.
___________________JOURNAL OF INDUSTRIAL ECOLOGY---WILEY
Submitted on: 10 August 1999.
Revised on: 19 October 1999.
Accepted on: 23 November 1999.
___________________JOURNAL OF INDUSTRIAL ECOLOGY---WILEY
Submitted on: 28 May 1998.
Revised on: 30 June 1998.
Accepted on: 19 August 1998.
___________________JOURNAL OF INDUSTRIAL ECOLOGY---WILEY