Potter, John, <br/><br/>
The Cambridge Companion to Singing : 

 -  Cambridge University Press,  2000. 
 - 300 pages 
<br/><br/><label>ISBN: </label>9780521627092 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Music.
<br/><br/><label>Dewey Class. No.: </label>782.009  / POT