Lugo, María de L., Gustavo A. Martínez, Luis E. Rivera, and Agenol González-Vélez. “WEED INCIDENCE AFTER APPLICATION OF SEWAGE SLUDGE COMPOST”. The Journal of Agriculture of the University of Puerto Rico 86, no. 1-2 (April 1, 2002): 67–68. Accessed December 3, 2022. https://revistas.upr.edu/index.php/jaupr/article/view/3185.