1. Use of contraception in the United States: 1982-2008;Mosher;Vital Health Stat,2010
2. Estimates of contraceptive failure from the 2002 National Survey of Family Growth;Kost;Contraception,2008
3. Contraceptive technology, 20th revised edition;Hatcher,2004
4. Disparities in rates of unintended pregnancy in the United States, 1994 and 2001;Finer;Persp Reprod Health,2006
5. Teenagers in the United States: sexual activity, contraceptive use and childbearing, 2002;Abma;Vit Health Stats,2004