共 30 条
[13]
ILLSLEY R, 1963, PERINATAL MORTALITY
[14]
KLEINMAN JC, 1981, NCHS DHHS PHS821232
[15]
KLEINMAN JC, 1983, NCHS DHHS PHS841232
[18]
MEYER MB, 1975, AM J EPIDEMIOL, V100, P443
[19]
NISWANDER KR, 1972, DHEW NIH73379 PUBL
[20]
PLACEK PJ, 1984, PUBLIC HEALTH REP, V99, P111