共 7 条
[1]
ABRAMOVICH DR, 1981, OBSTETRICS GYNAECOLO, V10
[2]
Butler NR, 1963, PERINATAL MORTALITY
[3]
CHAMBERLAIN R, 1975, BRIT BIRTHS 1970, V1
[4]
Hammoud E I, 1977, World Health Stat Rep, V30, P174
[5]
McKEOWN THOMAS, 1951, HUMAN BIOL, V23, P41
[6]
SAMPHIER M, 1981, ABERDEEN MATERNITY N
[7]
1981, BIRTHWEIGHT HEAD CIR