Smita, Madhu, and Dinesh Goyal. “Isolation and Characterization of Free-Living Nitrogen Fixing Bacteria from Alkaline Soils”. International Journal of Scientific World 5, no. 1 (December 18, 2016): 18–22. Accessed December 22, 2024. https://sciencepubco.com/index.php/IJSW/article/view/6936.