Document Type : Research Paper
Authors
1 PhD candidate of forest sciences, Gorgan University of agricultural sciences and natural resources, I. R. Iran.
2 Associated prof., of forestry, Gorgan University of agricultural sciences and natural recourses, I. R. Iran
3 Associated prof., of forest engineering, Faculty of Natural Resources, University of Tehran, I. R. Iran
4 Associated prof., of forest ecology, Gorgan University of agricultural sciences and natural recourses, I. R. Iran
5 .
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