Ahrens, Christian <br/><br/>
Valved brass : the history of an invention 
by Christian Ahrens ; translated by Steven Plank 
 - Hillsdale, NY  Pendragon Press  c2008 
 - xiii, 135 p. : ill. ; 24 cm 
<br/><br/> Includes bibliographical references (p. 125-129) and index 
<br/><br/><label>ISBN: </label>9781576471371 
<br/><br/><label>ISSN: </label>2008011745 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Brass instruments
<br/><br/><label>Dewey Class. No.: </label>788.91922 AHR