Linden, Eugene. <br/><br/>
Apes, men, and language / 
[by] Eugene Linden. 
 - [New York] :  Penguin Books,  [1976, c1974] 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 289-291. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chimpanzees -- Behavior.--Chimpanzees -- Behavior.<br/>Animal communication.<br/>Sign language.