A rich ape is a happy ape (1993)
Jones, R.
Abstract
Chimpanzees were attracted to boxes right away, but quickly grew tired of them. In comparison, orangutans tore the boxes up, but used them even more after they were torn into several pieces.
Published
1993
Citation
Jones, R. 1993. A rich ape is a happy ape. ChimpanZoo Conference Proceedings, 79-82.
Full Article
No link assigned.