CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 8,1998, Pages 469, doi:10.3760/j.issn:0529-567X.1998.08.006
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 8,1998, Pages 482, doi:10.3760/j.issn:0529-567X.1998.08.010
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 8,1998, Pages 510, doi:10.3760/j.issn:0529-567X.1998.08.022
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 8,1998, Pages 472, doi:10.3760/j.issn:0529-567X.1998.08.007
CHINESE JOUNAL OF OBSTETRICS AND GYNECOLOGY, , Issue 8,1998, Pages 471, doi:10.3760/j.issn:0529-567X.1998.08.015