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Чикаго-гийн эшлэл (17 дахь хэвлэлт)Organisation for Economic Co-operation and Development, Statistical Office of the European Communities, ба ProQuest (Firm). Purchasing Power Parities and Real Expenditures: 2005 Benchmark Year = Parites De Pouvoir D'achat Et Depenses Reelles : Annee De Reference 2005. [2007 ed.]. Paris: OECD/Eurostat, 2008.
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