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Gary P. Sempson, . (2005). The who and Sustainable Development. [s.l]: United Nations University Press, New York.
Gary P. Sempson, . 2005. The who and Sustainable Development. [s.l]: United Nations University Press, New York.
Gary P. Sempson, . The who and Sustainable Development. [s.l]: United Nations University Press, New York. 2005.