共 20 条
[1]
Adams M M, 1991, Paediatr Perinat Epidemiol, V5, P333, DOI 10.1111/j.1365-3016.1991.tb00718.x
[2]
[Anonymous], SAS STAT US GUID VER
[3]
[Anonymous], VITAL HLTH STAT
[4]
[Anonymous], 1996, GUID CLIN PREV SERV
[5]
Brown SarahS., 1995, The best intentions: Unintended pregnancy and the well-being of children and families
[6]
Colley Gilbert B J, 1999, MMWR CDC Surveill Summ, V48, P1
[8]
Contraceptive failure rates: New estimates from the 1995 National Survey of Family Growth
[J].
FAMILY PLANNING PERSPECTIVES,
1999, 31 (02)
:56-63