Obstetricia de Williams / F. Gary Cunningham...(et-al) 

 - 22a. ed. 
 - México : McGraw-Hill, 2006 
 - 1439 p. 
<br/><br/><label>ISBN: </label>970-10-5482-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Obstetricia
<br/><br/><label>Dewey Class. No.: </label>618.2 O14w 2006