JOURANL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 16, Issue 4,2000, Pages 205-206, doi:10.3969/j.issn.1003-6946.2000.04.019
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JOURANL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 16, Issue 4,2000, Pages 190-191, doi:10.3969/j.issn.1003-6946.2000.04.012
JOURANL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 16, Issue 4,2000, Pages 174-175, doi:10.3969/j.issn.1003-6946.2000.04.004
JOURANL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 16, Issue 4,2000, Pages 213-214, doi:10.3969/j.issn.1003-6946.2000.04.023