PÉREZ ESCOLAR, R. Characterization of Clays and Clay-organic Complexes. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 50, n. 4, p. 303–315, 1966. DOI: 10.46429/jaupr.v50i4.3469. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/3469. Acesso em: 17 aug. 2022.