1. Maternal and fetal infections;Gibbs,1994
2. Case definitions for infectious conditions under public-health surveillance;MMWR,1997
3. Rubella;Amstey,1992
4. Rubella and pregnancy. ACOG Technical Bulletin 171,1992
5. Current trends increase in rubella and congenital rubella syndrome—United States, 1988–1990;MMWR,1991