Neoplasms and related disorders of invertebrate and lower vertebrate animals: Clyde J. Dawe and John C. Harshbarger, Symposium Co-Chairmen and Editors. Proceedings of a Symposium held at the Smithsonian Institution, Washington, D.C., on June 19–21, 1968, sponsored by the Smithsonian Institution and the National Cancer Institute. National Cancer Institute Monograph 31, Public Health Service, U.S. Department of Health, Education and Welfare. Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402. July, 1969. xiv + 772 pp. Price $9.00