A fieldstudy on Sumatran orang utans (Pongo pygmaeus abelii, lesson 1827)
Subtitle: ecology, behaviour and conservation
By: H.D. Rijksen.
Series: Mededelingen Landbouwhogeschool Wageningen, Nederland ; 78-2 (1978)
Publisher: H. Veenman
Published: 1978
Place of publication: Wageningen
Language: eng
Number of pages: 420
Subjects: Orangutan; Orangutan -- Behavior; Pongo pygmaeus; Ecology; Behavior, Animal
Other titles: Field study on Sumatran orang utans (Pongo pygmaeus abelii, lesson 1827); Sumatran orang utans.; Pongo pygmaeus abelii.
Notes: Also published as a thesis.

Summaries in English, Dutch and Indonesian.

Includes bibliographical references (p. 392-404).