共 10 条
- [1] BARRAT J, 1974, 3 JOURN NAT MED PER, P145
- [2] FLETCHER CM, 1970, WHO CHRON, V24, P345
- [3] Hubert C, 1972, J Gynecol Obstet Biol Reprod (Paris), V1, P843
- [4] LETCHWORTH AT, 1971, J OBSTET GYN BR COMM, V78, P542
- [6] RUSH D, 1974, J OBSTET GYN BR COMM, V81, P746
- [9] TARGETT CS, 1973, J OBSTET GYN BR COMM, V80, P815