Pérez-Escolar, R. and Lugo-López, M. A. (1957) “The Effect of Synthetic Soil Conditioners on Soil-Aggregate Stability and the Production of Potatoes and Stringless Beans”, The Journal of Agriculture of the University of Puerto Rico, 41(2), pp. 127–133. doi: 10.46429/jaupr.v41i2.12623.