Swiecki, Tedmund J.; Bernhardt, Elizabeth A. (2006). A Field Guide to Insects and Diseases of California Oaks. Pacific Southwest Research Station (Report). Gen. Tech Rep. PSW-GTR-197. Albany, California: U.S. Forest Service Treesearch Department. p. 42. doi:10.2737/PSW-GTR-197. This article incorporates text from this source, which is in the public domain.