Alexander, Alex G. “Ripening Proficiencies of Polaris, CP 70139, RH 1622, Ripenthol, and PP 757 in Early-Adult Sugarcane”. The Journal of Agriculture of the University of Puerto Rico 60, no. 4 (October 1, 1976): 451–459. Accessed November 30, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/10489.