Zekri, Mongi, and Thomas A. Obreza. 2003. “Micronutrient Deficiencies in Citrus: Boron, Copper, and Molybdenum: SL 203 SS422, 1 2003”. EDIS 2003 (2). Gainesville, FL. https://doi.org/10.32473/edis-ss422-2003.