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Hernández Medina, E. and Lugo López, M.A. 1969. Effect of Minor Nutrient Elements and Magnesium Upon the Growth, Development, and Yields of Plantains. The Journal of Agriculture of the University of Puerto Rico. 53, 1 (Jan. 1969), 33–40. DOI:https://doi.org/10.46429/jaupr.v53i1.11175.