Rijksen, H. D. C. <br/><br/>
A fieldstudy on sumatran oraguntans (Pongo pygfmaeus Abelii Lesson 1827) ecology, behaviour and conservation 

 - Wageningen :  Veenman & Zonen,  1978 
 - 420 p.  : ilus. 
 - Mededelingen Landbouwhogeschool  ; 78-2 .
 - Mededelingen Landbouwhogeschool  ; 78-2 .
<br/><br/><label>LCCN: </label>48465 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Orangutanes.
<br/><br/><label>Dewey Class. No.: </label>599.884  / R5