1. Report on the cancer-related health check-up: cancer of the cervix;American Cancer Society;Cancer,1980
2. Cervical cancer screening programs: summary of the 1982 Canadian task force report;Walton;Can Med Assoc J,1982
3. Cervical smears;Spriggs;Br Med J,1977
4. Cervical carcinoma in the aged;Siegler;Am J Obstet Gynecol,1969