CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 11,1998, Pages 681, doi:10.3760/j.issn:0529-567X.1998.11.015
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 11,1998, Pages 663, doi:10.3760/j.issn:0529-567X.1998.11.034
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 11,1998, Pages 661-663, doi:10.3760/j.issn:0529-567X.1998.11.007
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 11,1998, Pages 646-648, doi:10.3760/j.issn:0529-567X.1998.11.002
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 11,1998, Pages 686-687, doi:10.3760/j.issn:0529-567X.1998.11.018