Sepúlveda, Y. L., Díez, M. C., Osorio, N. W., Moreno, F. H., & León, J. D. (2014). Characterization of visual symptoms of nutritional deficiencies in oak seedlings. Agronomía Costarricense, 38(1). https://doi.org/10.15517/rac.v38i1.15164