Landrau, Jr., P., Samuels, G., & Alers-Alers, S. (1959). The Response of Two Sugarcane Varieties to Fertilizers at Río Piedras, 1954-57. The Journal of Agriculture of the University of Puerto Rico, 43(2), 73–88. https://doi.org/10.46429/jaupr.v43i2.12546