1. Adam, Y. G., H. Volk, and D. State: Low colorectal anastomosis after resection for cancer. Surg. Gynec. Obstet.125: 1259, 1967.
2. American Cancer Society: 1968 Cancer Facts and Figures. New York, American Cancer Society, Inc., 1967, 32 pp.
3. Axtell, L. M., and L. Chiazze, Jr.: Changing relative frequency of cancers of the colon and rectum in the United States. Cancer.19: 750, 1966.
4. Bacon, H. E., and R. R. Gutierrez: Cancer of the rectum and colon: Review of 2,402 personal cases. Dis. Colon & Rectum.10: 61, 1967.
5. Beahrs, O. H., and A. R. Wychulis: Malignant lesions of the colon.In Walters, W., and Ellis, F. H., Jr.: Lewis’ Practice of Surgery. New York, Hoeber Medical Division, Harper & Row, Publishers, 1967, vol. 6, chap. 10 N, pp. 1–78.