共 4 条
[1]
Colcher AE, 1944, AM J ROENTGENOL RADI, V51, P207
[2]
EFFIONG EI, 1975, BR J OBSTET GYNAECOL, V82, P228
[3]
LISTER UG, 1960, J OBSTET GYNAECOL, V67, P188
[4]
SCHER J, 1970, Journal of Obstetrics and Gynaecology of the British Commonwealth, V77, P259