81: Contraceptive use and pregnancy risk among U.S. high school students, 1991-2003

• 作者John S. Santelli; Brian Morrow; John E. Anderson; Laura Lindberg
• 卷第38卷
• 期第2期
• 印刷ISSN1054-139X
• 文件大小43.38KB
• 发表时间2006
• DOI10.1016/j.jadohealth.2005.11.063