Impacts of Overgrazing in a Long Term Traditional Grazing Ecosystem on Vegetation Around Watering Points in a Semi-Arid Rangeland of North-Eastern Iran

N. Hassani, H.R Asghari, A.S. Frid and M. Nurberdief

Pakistan Journal of Biological Sciences 11 ( 13 ): 1733 - 1737 , 2008