Zakka, T., M. R. Hassan, . R. J. Tanko, B. M. . Munza, and A. A. . Sadiq. “Effect of Variety and Plant Spacing on Yield Components of Two Sorghum Varieties (Sorghum Bicolor L. Moench)”. Nigerian Journal of Animal Production, vol. 48, no. 1, Mar. 2021, pp. 175-84, doi:10.51791/njap.v48i1.2883.