共 6 条
[1]
BENNETTS AB, 1982, LANCET, V1, P378
[2]
FAISON JB, 1979, OBSTET GYNECOL, V54, P527
[3]
FLEISS JL, 1982, WILEY SERIES PROBABI
[4]
GOODLIN RC, 1980, LANCET, V1, P1017
[5]
LUBIC RW, 1980, HLTH POLICY NURSING
[6]
SCUPHOLME A, 1986, OBSTET GYNECOL, V67