Fatima Zahra Lahdachi, Laila Nassiri, and Jamal Ibijbijen. 2019. “Nitrogen Fixing Potential of Acacia Gummifera At Different Ages Inoculated With Rhizobium Isolates”. Global Journal of Science Frontier Research 19 (D2):1-9. https://journalofscience.org/index.php/GJSFR/article/view/2498.