Hameed, R.A.H. et al. 2015. Genetic Variation of Sinorhizobium meliloti Isolates Differing in Their Ability to Drought Tolerance. Journal of Biotechnology Research Center. 9, 2 (Jun. 2015), 7–22. DOI:https://doi.org/10.24126/jobrc.2015.9.2.427.