A. Al-Safar, F., A. Al-Katib, M. and I. Al- Barhawi, N. (2010) “Effect of Extract Callus Plant Rue on the Growth of Bacteria Sinorhizobium meliloti and its Relationship with Plant Alfalfa Medicago sativa”, Rafidain Journal of Science, 21(7), pp. 78–86. doi: 10.33899/rjs.2010.35129.