共 20 条
[2]
ANDREWS WW, 1995, IN PRESS OBSTET GYNE
[3]
Cassell G., 1993, American Journal of Obstetrics and Gynecology, V168, P425
[4]
DUFF P, 1987, OBSTET GYNECOL, V69, P756
[5]
GIBBS RS, 1982, OBSTET GYNECOL, V60, P671
[8]
Hauth J. C., 1995, American Journal of Obstetrics and Gynecology, V172, P253
[9]
LEIGH J, 1986, OBSTET GYNECOL, V67, P500
[10]
THE EPIDEMIOLOGY OF PRETERM BIRTH
[J].
CLINICAL OBSTETRICS AND GYNECOLOGY,
1988, 31 (03)
:521-532