Sánchez, Michel, José Lucas Peña, Leonardo León, and Oscar Caballis. “Fertility Levels in Soils of the José María Vargas Municipality”. INIA Divulga 34, no. 34 (August 30, 2016): 57-63. Accessed November 18, 2025. http://publicaciones.inia.gob.ve/index.php/iniadivulga/article/view/766.