published by Damascus University in 2005 in Forestry and Ecology and research's language is العربية Download

Bohn, C. C. and Buck house. J. (1985). Some responses of riparian soils to grazing management in northeastern Oregon . J. Range Manage. 38 : 347 – 382

Dillon, C. C. (1958). Benefits of rotation grazing on northwest ranges . J . Range Manage . 11 : 278 – 281

Hart, R. H., Samuel, M. J. P. S. Test and M. A. Smith. (1988). Cattle, Vegetation, and economic rerponses to grazing systems and grazing pressure. J. Range Manage.41:282-286