Alexander, A.G. 1977. Efficiency of Chemical Ripener Action in Sugarcane. V. Superior Efficiency of CP 70139 (Monsanto) in Direct Comparisons with Polaris. The Journal of Agriculture of the University of Puerto Rico. 61, 2 (Apr. 1977), 160–169. DOI:https://doi.org/10.46429/jaupr.v61i2.10453.