1. Are there markers for the risk of colorectal cancer?;Sherlock;N Engl J Med,1984
2. Detection of early colon cancer and colonic polyps;Winawer,1980
3. Principles of screening and evaluation of screening programs;US Commission on Chronic Illness,1985
4. Screening for colorectal cancer;Winawer,1985
5. How do we detect hereditary large bowel cancer?;Schwartz,1982