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

 -  BLACK WELL  2007 
 - 1042-1586,HB  9-12 
 -  114 .
<br/><br/><label>ISSN: </label>14700328 
<br/><br/><label>Dewey Class. No.: </label>618.205