1. The Languages of the Andes
2. Aikhenvald, A. Y. (2002). Language contact in Amazonia. Oxford University Press.
3. Balée, W. (1994). Footprints of the forest: Ka’apor ethnobotany – The historical ecology of plant utilization by an Amazonian people. Columbia University Press.
4. Barth, F. (Ed.). (1998 (1969)). Ethnic groups and boundaries: The social organization of culture difference. Universitetsforlaget.
5. Naven