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Allen, T.H. 2009. The Transformation of Forest and Marsh in an Agricultural Landscape. Geocarto International. Volume 24, Issue 1 February 2009 , pages 37 - 46.
Allen, T. H. 2009. Tibet: Landscape of Tradition and Change. FOCUS on Geography: The American Geographical Society, Vol. 52, No. 2, Fall 2009.