共 25 条
- [1] CALKINS LH, 1952, AM J OBST GYNEC, V64, P480
- [2] DANFORTH DN, 1956, J OBSTET GYNAECOL, V63, P237
- [3] EASTMAN NJ, 1956, WILLIAMS OBSTETRICS
- [4] EDWARDS L F, 1955, J Natl Med Assoc, V47, P115
- [6] EMBREY MP, 1954, J OBSTET GYN BRIT EM, V61, P793
- [9] GOULD GM, 1937, ANOMALIES CURIOSITIE