共 11 条
- [1] BENDER S, 1952, J OBSTET GYN BRIT EM, V59, P510
- [2] EASTMAN NJ, 1950, WILLIAMS OBSTETRICS
- [3] GREENHILL JP, 1951, PRINCIPLES PRACTICE
- [4] GUTTMACHER AF, 1953, OBSTET GYNECOL, V2, P22
- [6] HIRST JC, 1940, PENN MED J, V43, P1553
- [7] LULL CB, 1945, CONTROL PAIN CHILDBI
- [8] MCILROY AL, 1927, MED J REC, V126, P359
- [9] MUNNELL EW, 1946, AM J OBSTET GYNECOL, V52, P588