Pérez López, A., and R. Mendoza Barbosa. “Yields of Four Cucumber Varieties After Treatment With a Nematocide”. The Journal of Agriculture of the University of Puerto Rico 48, no. 2 (April 1, 1964): 135–139. Accessed July 17, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12984.