Duden. <br/><br/>
Deutsches universal worterbuch .  [[Reference] /] 
 معجم دودن العالمي. 
Duden. 
 - Cairo . :  Duden.,  1999. 
 - 1816 p. ;  24 cm . 
<br/><br/> All age. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dictionaries .--Garmany-language .
<br/><br/><label>Dewey Class. No.: </label>433 
<br/><br/><label>National Library of Medicine Call No.: </label> / DD