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Literature Cited

  • Daily, G. C., editor. 1997. Nature's services: societal dependence on natural ecosystems. Island Press, Washington , D.C .
  • Dasgupta, P. 2001. Human well-being and the natural environment. Oxford University Press, Oxford , United Kingdom .
  • Heal, G. 2000. Nature and the marketplace. Island Press, Washington , D.C .