1. Browne, P. 1789. The civil and natural history of Jamaica.
2. Camp, A. F., and B. R. Fudge. 1939. Some symptoms of malnutrition in citrus. Fla. Agr. Exp. Sta., Bull.335.
3. Citrus fruits in health and disease. 1947. Florida Citrus Commission.
4. Felix, C. E. 1939. Citrus growing in Florida. Fla. Dept. Agr., Bull.2: 156–160.
5. Florida Citrus Code of 1949: Chap. 25149. Fla. Dept. Agr.