共 6 条
[2]
DRUZIN ML, 1978, AM J OBSTET GYNECOL, V131, P276
[3]
FALL O, 1979, OBSTET GYNECOL, V53, P712
[4]
LEHMANN V, 1977, Z GEBURTSH PERINATOL, V181, P390
[5]
Saling E, 1975, J Perinat Med, V3, P115, DOI 10.1515/jpme.1975.3.2.115