Velázquez, Yovanny A., Robert A. Kluson, and Eduardo C. Schroder. “Rhizobium Inoculation of Phaseolus Vulgaris in Lajas, Puerto Rico”. The Journal of Agriculture of the University of Puerto Rico 72, no. 3 (July 1, 1988): 427–436. Accessed November 22, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/6871.