Fernández, María del C. C. “Effect of Filter-Press Cake on Tomato Plants Grown in Sterilized and Unsterilized Soil”. The Journal of Agriculture of the University of Puerto Rico 46, no. 3 (July 1, 1962): 167–170. Accessed April 23, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12330.