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Чикаго-гийн эшлэл (17 дахь хэвлэлт)National Research Council (U.S.). Committee on Strategic Directions for the Geographical Sciences in the Next Decade ба Inc ebrary. Understanding the Changing Planet: Strategic Directions for the Geographical Sciences. Washington, D.C.: National Academies Press, 2010.
MLA -ийн эшлэл (9 дэх хэвлэлт)National Research Council (U.S.). Committee on Strategic Directions for the Geographical Sciences in the Next Decade ба Inc ebrary. Understanding the Changing Planet: Strategic Directions for the Geographical Sciences. National Academies Press, 2010.