Obstetrics :normal and problem pregnancies /[edited by] Steven G. Gabbe [and 8 others]. 

 - Seventh edition. 
 - Philadelphia, PA  Elsevier  2017 
<br/><br/><label>ISBN: </label>9780323321082 
<br/><br/><label>National Library of Medicine Call No.: </label>WQ 200.1 O14 2017