Evolution, ecology, behavior, and captive maintenance / 
editor, Duane M. Rumbaugh, list of contributors, B. Chiarelli ... [et al.] 
 - Basel :  S. Karger,  1972 
 - 263 p. :  ill. ;  24 cm. 
 - Gibbon and siamang ;  v.1 .
 - Gibbon and siamang ;  v.1 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gibbons