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Hernández-Medina, E. and Lugo-López, M.A. 1958. Effects of the Calcium-Boron Relationship on Growth and Production of the Pineapple Plant. The Journal of Agriculture of the University of Puerto Rico. 42, 4 (Oct. 1958), 207–223. DOI:https://doi.org/10.46429/jaupr.v42i4.12601.