Acosta Matienzo, A., C. González Molina, and G. Samuels. “Response of Filler Tobacco Crop to Different Planting Dates”. The Journal of Agriculture of the University of Puerto Rico 50, no. 3 (July 1, 1966): 161–173. Accessed March 28, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/3454.