共 5 条
[1]
MCCLAIN GH, 1967, OBSTET GYNECOL, V29, P475
[2]
MILLER E I, 1975, Journal of Clinical Ultrasound, V3, P281, DOI 10.1002/jcu.1870030409
[5]
WILSON CJ, 1974, BRIT J SURG, V61, P495