ESCHENWALD, Adolfo; HALL, Carl W. Coefficient of Friction, Angle of Repose, Specific Gravity, and Bulk Density of Coffee Fruits and Coffee Beans. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 45, n. 1, p. 19–25, 1961. DOI: 10.46429/jaupr.v45i1.12108. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/12108. Acesso em: 29 mar. 2024.