1. Diseases of Colon and Rectum;Turell,1969
2. Complications of colotomy and polypectomy;Kleinfield;Surg Gynecol Obstet,1960
3. A new approach to colonic polyps;Wolff;Ann Surg,1973
4. cited from discussions on Drs. Wolff and Shinya’s presentation;Hedberg;Ann Surg,1973
5. Report from San Diego;Roseman;Gastroin- test Endosc,1973