Author: Rijksen, H.D.
Title: A fieldstudy on Sumatran Orang Utans (Pongo Pygmaeus Abelii Lesson 1827). Ecology, behaviour and conservation.
Description: Wageningen, H. Veenman, 1978. 421 pp. 161 b/w figs. Soft cover. - First free endpaper missing. (Mededelingen Landbouwhogeschool Wageningen 78-2).

Keywords: Zoology Apes Monkeys Primates Zoölogie Zoologie Apen Primaten