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              PARK, R. 1952. Human Communities. Glencoe, UK: Free Press.
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              Park, R. (1952). Human communities: The city and human ecology. New York: Free Press.
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              Park, R. E. (1952). Human Communities. Chicago, IL: Free Press.
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              Park, R. E. (1952). Human communities. Illinois: The Free Press of Glencoe.
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              Park, Robert E. 1952. Human Communities: The City and Human Ecology. Glencoe: The Free Press.
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              Park, Robert Ezra: Human Communities. The City and Human Ecology, New York/London 1952.
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