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%T Human communities: the city and human ecology %A Park, Robert Ezra %P 278 %V 2 %D 1952 %I Free Press %~ Universitäts- und Stadtbibliothek Köln %> https://nbn-resolving.org/urn:nbn:de:0168-ssoar-50435-9 %C USA %C Glencoe, Ill. %G en %9 Monographie %W GESIS - http://www.gesis.org %~ SSOAR - http://www.ssoar.info