References
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- Centers for Disease Control . 1992 . Sexual behavior among high school students—United States . MMWR , 40 ( 51 & 52 ) : 885 – 888 . 1990
- Centers for DiseaseControl . 1991 . Premarital sexual experience among adolescent women—United States, 1970–1988 . MMWR , 39 ( 51 & 52 ) : 929 – 932 .