共 18 条
- [1] Intended pregnancies and unintended pregnancies: Distinct categories or opposite ends of a continuum? [J]. FAMILY PLANNING PERSPECTIVES, 1999, 31 (05): : 251 - 252
- [3] BROWN SS, 1995, BEST INTENTIONS UNIN, V68, P77
- [4] *CTR EST POBL PAT, 1995, EC ENC DEM SAL MAT I
- [7] GAGE AI, 1996, AD9605 PENNS STAT U
- [8] HUMMER RA, 1992, RETROSPECTIVE REPORT
- [9] RACE, INTERVENING VARIABLES, AND 2 COMPONENTS OF LOW-BIRTH-WEIGHT [J]. DEMOGRAPHY, 1993, 30 (03) : 489 - 506