Tregenza, Jo <br/><br/>
Communication 
Jo Tregenza 
 - 1st ed 
 - Oxford  Oxford University Press  2009 
 - 40 p. : ill 
<br/><br/><label>ISBN: </label>9780198471660 
<br/><br/><label>Dewey Class. No.: </label>371.3028 TRE