1. American Cancer Society: Cancer in the economically disadvantaged. Prepared by the Subcommittee on Cancer in the Economically Disadvantaged, New York, New York, June 1986
2. American Cancer Society: Statement by Dr. Harmon Eyre, national president, ACS, New York, New York, January 1988
3. American College of Obstetricians and Gynecologists: Cervical cytology: Evaluation and management of abnormalities. ACOG bulletin no. 81. Washington, DC, 1984
4. American College of Obstetricians and Gynecologists: Statement of George Morley, MD, president, ACOG. Washington, DC, ACOG, January 19, 1988
5. Organization of the cervical cytology screening programme in British Columbia, 1955–85;Anderson;B Med J,1988