TY  - BOOK
AU  - Rijksen, H. D. C.
TI  - A fieldstudy on sumatran oraguntans (Pongo pygfmaeus Abelii Lesson 1827) ecology, behaviour and conservation
T2  - Mededelingen Landbouwhogeschool
U1  - 599.884 
PY  - 1978///
CY  - Wageningen
PB  - Veenman & Zonen
KW  - Orangutanes
ER  -