Johnson, R. W., & Brown, G. M. (1976). Cleaning up Europe's waters: Economics, management and policies. Praeger.
Citace podle Chicago (17th ed.)Johnson, Ralph Whitney, a Gardner Mallard Brown. Cleaning Up Europe's Waters: Economics, Management and Policies. New York: Praeger, 1976.
Citace podle MLA (9th ed.)Johnson, Ralph Whitney, a Gardner Mallard Brown. Cleaning Up Europe's Waters: Economics, Management and Policies. Praeger, 1976.
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