Batchelor, L.D., & Webber, H.J. 1948 . The Citrus Industry. Vol. II. Production of the Crop. University of California Press Berkeley & Los Angeles 933 pp.

Notes: Scale species are discussed in the chapters on Biological Control of Insect Pests (H.S. Smith), Biological Control of Citrus Insects by Parasitic Fungi and Bacteria (Fawcett, H.S.), Insects and Mites and Their Control (A.M. Boyce) and Quarantine and Quarantine Service (H.S. Smith).