Lugo-López, M. A., J. A. Bonnet, A. S. Amy, and R. Pérez-Escolar. “Effect of Soil-Structure Stabilizers on the Production of Tobacco Plants in the Seedbed”. The Journal of Agriculture of the University of Puerto Rico 41, no. 3 (July 1, 1957): 189–196. Accessed April 26, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12618.