共 10 条
- [1] BARRON SL, 1966, BRIT J PREV SOC MED, V20, P127
- [2] CHENG MCE, 1972, J OBSTET GYN BR COMM, V79, P149
- [4] LUBCHENCO LO, 1963, PEDIATRICS, V32, P793
- [6] McKeown T, 1951, BR J SOC MED, V5, P98
- [7] MILNER RDG, 1974, J OBSTET GYN BR COMM, V81, P956
- [8] STEEL RGD, 1960, PRINCIPLES PROCEDURE, P132
- [9] THOMSON A M, 1968, Journal of Obstetrics and Gynaecology of the British Commonwealth, V75, P903
- [10] [No title captured]