SHUKLA, Lal N. Trends in the Use of Tractor Power for Sugarcane Production in Puerto Rico. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 59, n. 4, p. 274–278, 1975. DOI: 10.46429/jaupr.v59i4.10600. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/10600. Acesso em: 19 apr. 2024.