共 14 条
[1]
BARRETT JM, 1982, AM J OBSTET GYNECOL, V143, P243
[7]
Mathews D D, 1967, J Obstet Gynaecol Br Commonw, V74, P523
[10]
PATERSON P J, 1970, Journal of Obstetrics and Gynaecology of the British Commonwealth, V77, P390