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조사결과.
환경부. 1999. 환경백서.
환경부. 1999. 환경통계연감
Allenby, Braden R. 1999. Industrial Ecology: Policy framework and implementation. New Jersey: Prentice Hall, Inc.
Anderson, Kym and Blackhurst, Richard . the Greening of World Trade Issues. Hertfordshire: Harvest Wheatsheaf
BBC. 1997. P
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