共 31 条
[3]
BERKOWITZ RL, ATLAS PERINATOLOGY
[4]
CAMPBELL S, 1977, Clinical Obstetrics and Gynecology, V20, P351, DOI 10.1097/00003081-197706000-00015
[5]
CAMPBELL S, 1975, LANCET, V1, P7915
[6]
CARPENTER M, UNPUBLISHED
[7]
CHEZ RA, 1978, FERTIL STERIL, V30, P16
[9]
DEVORE GR, 1979, S REAL TIME ULTRASOU
[10]
DUENHOELTER JH, 1976, OBSTET GYNECOL, V47, P618