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Hassan Pourbabaei
University of Guilan, Faculty of Natural Resources, Department of Forestry, Sowmehsara, P.O. Box 1144, Guilan, Iran, phone: +981344323599, fax: 981344323600
Mohammad Naghi Adel
University of Guilan, Faculty of Natural Resources, Department of Forestry, Sowmehsara, P.O. Box 1144, Guilan, Iran, phone: +981344323599, fax: 981344323600