S.A. Mohaddes, Mohaddes and Mohd Ghazali Mohayidin, (2008) Application of the Fuzzy Approach for Agricultural Production Planning in a Watershed, a Case Study of the Atrak Watershed, Iran. American-Eurasian J. Agric. & Environ. Sci, 3 (4). pp. 636-645. ISSN 1818-6769