HOPKINS, E. F.; PAGÁN, Víctor; RAMÍREZ SILVA, F. J. IRON AND MANGANESE IN RELATION TO PLANT GROWTH AND ITS IMPORTANCE IN PUERTO RICO. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 28, n. 2, p. 43–101, 1944. DOI: 10.46429/jaupr.v28i2.12877. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/12877. Acesso em: 23 apr. 2024.