CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 4,1998, Pages 239, doi:10.3760/j.issn:0529-567X.1998.04.016
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 4,1998, Pages 244, doi:10.3760/j.issn:0529-567X.1998.04.020
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 4,1998, Pages 209, doi:10.3760/j.issn:0529-567X.1998.04.005
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 4,1998, Pages 242, doi:10.3760/j.issn:0529-567X.1998.04.018
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 4,1998, Pages 249, doi:10.3760/j.issn:0529-567X.1998.04.022