The Lesser apes :  evolutionary and behavioural biology / 
editors by Holger Preuschoft ... [et al.]. 
 - Edinburgh :  Edinburgh University Press,  1984. 
 - xiii, 709 p :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography : p.639-685. 
<br/><br/><label>ISBN: </label>0852244487 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gibbons.<br/>Siamang.