International research on natural resource management : advances in impact assessment / edited by H. Waibel, Institute of Development and Agricultural Economics, Faculty of Economics and Management, Leibniz University of Hannover, Germany and D. Zilberman, Department of Agricultural and Resource Economics, University of California at Berkeley, USA..    Wallingford, Oxfordshire, UK : CABI, on behalf of the Science Council of the Consultative Group on International Agricultural Research, 2007.  ?007 . 1 online resource (xviii, 270 pages)
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