Dhami, N., and B. N. Prasad. “Increase in Root Nodulation and Crop Yield of Soybean by Native <i>Bradyrhizobium japonicum</i> Strains”. Botanica Orientalis: Journal of Plant Science, vol. 6, Mar. 2010, pp. 1-3, doi:10.3126/botor.v6i0.2902.