Irizarry, H., H. Azzam, and R. Woodbury. “Evaluation of Black Polyethylene Plastic Mulch for Tomato Production in Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 52, no. 1 (January 1, 1968): 53–63. Accessed February 3, 2023. https://revistas.upr.edu/index.php/jaupr/article/view/11723.