共 22 条
- [11] MEYER MB, 1977, EPIDEMIOLOGY PREMATU
- [12] MILNER RDG, 1974, J OBSTET GYN BR COMM, V81, P956
- [14] NELIGAN G, 1965, CLIN DEV MED, V19, P28
- [15] RANTAKALLIO P, 1969, ACTA PAEDIATR S S193, V58, P1
- [16] ROOTH G, 1979, LANCET, V2, P1170
- [17] STERKY G, 1970, PEDIATRICS, V46, P7
- [18] THOMSON A M, 1968, Journal of Obstetrics and Gynaecology of the British Commonwealth, V75, P903
- [19] WILLIAMS RL, 1982, OBSTET GYNECOL, V59, P624