Dudenverlag ,. <br/><br/>
Duden briefe gut und richting schreiben  [[Reference] /] 
Dudenverlag ,. 
 - Mannheim :  Dudenverlag ,  1997. 
 - 791 p. ;  23 cm. 
<br/><br/> All age. 
<br/><br/><label>ISBN: </label>3411055626 
<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