.Conrad, J. M., & .Clark, C. W. (1987). Natural resource economics: Notes and problems. Cambridge University Press.
Chicago Style (17. basım) Atıf.Conrad, Jon M., ve Colin W. .Clark. Natural Resource Economics: Notes and Problems. [Cambridge [Cambridgeshire ; New York: Cambridge University Press, 1987.
MLA (9th ed.) Atıf.Conrad, Jon M., ve Colin W. .Clark. Natural Resource Economics: Notes and Problems. Cambridge University Press, 1987.
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