共 7 条
[3]
MACK LA, 1982, J ULTRAS MED, V1, P13
[4]
NAPOLITANI FD, 1960, AM J OBSTET GYNECOL, V80, P582
[5]
SIMPSON P, 1983, AM J OBSTET GYNECOL, P842
[6]
STRAUSS F, 1967, HDB SPEZIELLEN PATHO, P222
[7]
VANALLEN MI, 1983, SEMIN PERINATOL, V7, P285