1. Early and congenital syphilis;Wendel;Obstet Gynecol Clin North Am,1989
2. Sexually Transmitted Disease in Canada 1991. Division of STD Control, Bureau of Communicable Disease Epidemiology, Laboratory Centre for Disease Control, Health Canada.
3. 1989 Sexually Transmitted Diseases Treatment Guidelines;MMWR,1989
4. Guidelines for the Prevention and Control of Congenital Syphilis;MMWR,1988
5. Summary of Notifiable Diseases, United States 1992;MMWR,1992