Sotomayor-Ríos, A., and L. Telek. “Forage Yield and Protein Content of Millo Blanco (Sorghum Bicolor) and Two F1 Hybrids”. The Journal of Agriculture of the University of Puerto Rico, vol. 61, no. 3, July 1977, pp. 300-4, doi:10.46429/jaupr.v61i3.10427.