1. Canadian Cancer Statistics 1990;National Cancer Institute of Canada,1990
2. Cancer statistics, 1991;Boring;CA,1991
3. Potential years of life lost, Canada, 1987–1988;Wilkins;Chronic Dis Can,1991
4. Breast Cancer Screening 1991: Evidence and Experience since the Forrest Report;Department of Health Advisory Committee,1991
5. Healthy People 2000: National Health Promotion and Disease Prevention Objectives;U.S. Department of Health and Human Services, Public Health Service;DHHS Publication No. (PHS) 91-50212,1991