共 6 条
- [1] Brush M G, 1966, J Obstet Gynaecol Br Commonw, V73, P954
- [2] FOX H, 1968, Journal of Obstetrics and Gynaecology of the British Commonwealth, V75, P448
- [3] MARTIN JD, 1964, J OBSTET GYN BR COMM, V71, P260
- [4] MORRIS ED, 1968, BRIT MED B, V24, P70
- [5] WIGGLESWORTH JS, 1964, J OBSTET GYN BR COMM, V71, P871
- [6] WOTIZ HERBERT H., 1961, FED PROC, V20, P199