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1Published 1992“...United Nations,...”
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3Published 2002“...Earthscan, for the United Nations Environment Programme,...”
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4Published 1999“...Earthscan for and on behalf of the United Nations Environment Programme,...”
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5Published 2007“...United Nations Environment Programme ; Stationery Office [distributor],...”
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6Published 1997“...United Nations Environment Programme ; Oxford University Press [distributor],...”
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