Callen, Peter <br/><br/>
Ultrasonography in obstetrics and gynecology 

 - 5th 
 - Philadelphia:  Elsevier Saunders,  2008 
<br/><br/><label>ISBN: </label>1416032649 9781416032649 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ultrasonography<br/>Gynaecology<br/>Obstetrics