1. Principles of research;Cornfield;Am J Ment Defic,1959
2. Clinical trials, chap 20. Principles of Medical Statistics;Hill,1971
3. Statistical Methods in Clinical and Preventive Medicine;Hill,1962
4. The randomized clinical trial;Ingelfinger;N Engl J Med,1972
5. The surgical mystique and the double standard;Spodick;Am Heart J,1973