Evolution, ecology, behavior and captive maintainance 
edited by Duane M. Rumbaugh 
 - Basel  S. Krager  1972 
 - x,263p.: ill.;  24cm.- 
 - Gibbons and Siamang : a series of volumes on the lessen apes ; v.1 .
<br/><br/><label>Dewey Class. No.: </label>599.882  / RUM