Palombit, Ryne Arthur, <br/><br/>
Pair bonds and monogamy in wild siamang (Hylobates syndactylus) and white-handed gibbon (Hylobates lar) in Northern Sumatra  [microform] / 
by Ryne Arthur Palombit. 
 - Ann Arbor, Mich. :  University Microfilms International,  1993. 
 - 5 microfiches ;  11 x 15 cm. 
<br/><br/>Thesis (Ph.D.)-University of California, 1992 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Siamang--Behavior<br/>Whitehanded gibbon--Behavior<br/>Gibbons<br/>Mammmals--Indonesia--Sumatera Utara