1. A Survey Concerning Cigarette Smoking, Health Check-ups, Cancer Detection Tests;American Cancer Society,1977
2. Smoking Habits of Canadians, 1977;Health and Welfare, Canada,1979
3. Nonparametrics;Lehmann,1975
4. What can the physician do to assist the patient to stop smoking?;Lichtenstein,1978
5. Adult Use of Tobacco, 1975;National Clearinghouse for Smoking and Health,1976