“Nitrogen Fixing Potential of Acacia Gummifera At Different Ages Inoculated With Rhizobium Isolates” (2019) Global Journal of Science Frontier Research, 19(D2), pp. 1–9. Available at: https://www.journalofscience.org/index.php/GJSFR/article/view/2498 (Accessed: 15 August 2026).