ALAMO, Carmen I.; GONZÁLEZ, Gladys. Marginal productivity of expenditures in research on coffee by the Agricultural Experiment Station. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 74, n. 4, p. 427–432, 1990. DOI: 10.46429/jaupr.v74i4.6681. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/6681. Acesso em: 20 apr. 2024.