Pérez Escolar, R. and Lugo López, M.A. 1969. Sulfur Transformation in a Saline Sodic Soil of the Lajas Valley. The Journal of Agriculture of the University of Puerto Rico. 53, 2 (Apr. 1969), 118–123. DOI:https://doi.org/10.46429/jaupr.v53i2.11167.