STEER P. <br/><br/>
JOURNAL OF OBSTETRICS & GYNAECOLOGY (BJOG ) 

 -  BLACK WELL  2008 
 - 1197-1729  10-13 
 -  115 .
<br/><br/><label>ISSN: </label>14700328 
<br/><br/><label>Dewey Class. No.: </label>618.205