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