CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 02,2001, Pages 69-71, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 02,2001, Pages 72-75, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 02,2001, Pages 76-78, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 02,2001, Pages 79-81, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 02,2001, Pages 82-83, Dol: