Darwin and facial expression :  a century of research in review / 
edited by Paul Ekman 
 - New York  Academic Press  1973 
 - xi, 273 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>0122367502 
<br/><br/><label>Subjects--Personal Names: </label><br/>Darwin, Charles, 1809--1882. Expression of the emotions in man and animals
<br/><br/><label>Subjects--Topical Terms: </label><br/>Facial expression