共 15 条
[1]
BODY K, 1976, PLACENTAL TRANSFER, P45
[2]
EIKNES SH, 1980, RECENT ADV ULTRASONI, V2, P233
[4]
GILL RW, 1978, ULTRASOUND MED, V4, P341
[5]
GILL RW, 1980, RECENT ADV ULTRASOUN, V2, P229
[8]
JOHNSTON K W, 1978, Ultrasound in Medicine and Biology, V4, P209, DOI 10.1016/0301-5629(78)90053-4
[10]
MCCALLUM W D, 1981, Clinical Obstetrics and Gynecology, V24, P837, DOI 10.1097/00003081-198109000-00010