共 6 条
[1]
DUENHOELTER JH, 1982, CONTEMP OBSTET GYNEC, V19, P239
[3]
SEPPALA M, 1980, LANCET, V1, P165
[4]
STENMAN UH, 1983, LANCET, V2, P647
[6]
VAITUKAITIS JL, 1972, AM J OBSTET GYNECOL, V113, P751