Snyder, Víctor A., y Miguel A. Vázquez. 2021. «COMPARISON OF THE CASAGRANDE AND DROP-CONE PENETROMETER METHODS FOR MEASURING THE LIQUID LIMIT IN PUERTO RICAN SOILS». Journal of Agriculture of the University of Puerto Rico 105 (2):263-68. https://doi.org/10.46429/jaupr.v105i2.20086.