Tetzchner, Stephen von  <br/><br/>
Introduction to sign teaching and the use of communication aids / 
Stephen von Tetzchner and Harald Martinsen ; translated by Kevin M. J. Quirk. 
 - London :   Whurr,   1992. 
 - x,256p. : ill. ; 24cm. 
<br/><br/><label>ISBN: </label>1870332288 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sign languages<br/>Nonverbal communication
<br/><br/><label>Dewey Class. No.: </label>419 TET M