Cowgill, H. B. “A METHOD OF IDENTIFICATION AND DESCRIPTION OF SUGAR CANE VARIETIES, AND ITS APPLICATION TO TYPES GROWN IN PORTO RICO”. The Journal of Agriculture of the University of Puerto Rico 1, no. 3 (July 1, 1917): 119–140. Accessed November 26, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/3352.