Mahmood, F., فائز, H. Mohammed, حسین, F. Salih, and فرح. “Effect of Some Mineral Nutrients in Growth and Some Physiological Variables in Barley Plant”. Journal of Education and Science (JES), vol. 20, no. 1, Sept. 2007, pp. 273-86, doi:10.33899/edusj.2007.162807.