.Conrad, J. M., & .Clark, C. W. (1987). Natural resource economics: Notes and problems. Cambridge University Press.
Style de citation Chicago (17e éd.).Conrad, Jon M., et Colin W. .Clark. Natural Resource Economics: Notes and Problems. [Cambridge [Cambridgeshire ; New York: Cambridge University Press, 1987.
Style de citation MLA (9e éd.).Conrad, Jon M., et Colin W. .Clark. Natural Resource Economics: Notes and Problems. Cambridge University Press, 1987.
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