HEPPERLY, P. R. Sorghum rust. III. Losses in hybrids under semi-arid conditions. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 75, n. 3, p. 233–240, 1991. DOI: 10.46429/jaupr.v75i3.3591. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/3591. Acesso em: 28 jun. 2022.