Excerpt: Plant galls or cecidia have always fascinated and bewildered the biologist and the layman, and only recently has there been much attention paid to the biology of gall makers and the physiology of gall development. There are several 'early' definitive books on galls by British, German, and American authors, but most are out of print or are replete with errors. Few are useful for quick identification of galls in the field.
Wilson, Louis F.
"The Pocket Encyclopedia of Plant Galls. Arnold Darlington. New York: Philosophical Library, 1968.191 pp. $7.50.,"
The Great Lakes Entomologist, vol 2
Available at: https://scholar.valpo.edu/tgle/vol2/iss1/11