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Citace podle Chicago (17th ed.)ebrary, Inc, Gary L. Gaile, a Cort J. Willmott. Geography in America at the Dawn of the 21st Century. Oxford ; New York: Oxford University Press, 2003.
Citace podle MLA (9th ed.)ebrary, Inc, et al. Geography in America at the Dawn of the 21st Century. Oxford University Press, 2003.
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