共 38 条
[1]
*AM MED ASS, 1989, 1989 1990 DIR GRAD M
[2]
[Anonymous], 1990, JAMA-J AM MED ASSOC, V263, P2344
[3]
RACE, HEALTH, AND HEALTH-SERVICES
[J].
AMERICAN JOURNAL OF PUBLIC HEALTH,
1993, 83 (07)
:939-941
[5]
CARPENTER MW, 1987, OBSTET GYNECOL, V70, P657
[6]
Centers for Disease Control and Prevention (CDC), 1993, MMWR Morb Mortal Wkly Rep, V42, P285