Gabas, Jr., Nilson. A Grammar of Karo, Tupí (Brazil). PhD thesis, Santa Barbara: University of California, 1999.

Furlong, Charles Wellington. 1917. "The Haush and Ona, Primitive Tribes of Tierra Del Fuego." In Proceedings of the nineteenth international congress of Americanists, held at Washington, December 15-17, 1915, edited by F. W. Hodge. 432-444. Washington.

Fuerst, René. 1971. "Erste Forschungsergebnisse Von Den Südlichen Nambikwara." In Verhandlungen des XXXVIII Internationalen Amerikanistenkongresses, Stuttgart-München, 1968, III: 315-321.

Fuchs, Helmut. 1959. "Investigaciones Etnologicas De Urgencia En Venezuela." In Bulletin of the International Committee on Urgent Anthropological Ethnological Research, 2: 36-48.

Fuchs, H. 1971. "Some Notes On Goajiro Research." In Verhandlungen des XXXVIII.~Internationalen Amerikanistenkongresses, Stuttgart-München, 12.~bis 18.~August, III: 13-22. Klaus Renner.

Fuchs, Helmuth. 1967. "Urgent Tasks in Eastern Venezuela." In Bulletin of the International Committee on Urgent Anthropological Ethnological Research, 9: 69-103.

Das Problem der Pianakotó-Tiriyó

Frikel, P. 1957. "Zur Linguistisch-ethnologischen Gliederung Der Indianerstämme Von Nord-Pará (Brasilien) Und Den Anliegenden Gebieten." In Anthropos, 52: 509-563.

Frikel, Protasio. 1970. "Os Kaxúyana: Notas Etno-históricas." 14:

Friede, Juan. 1952. "Los Kofán: Una Tribu De La Alta Amazonía Colombiana." In Proceedings of the thirtieth International Congress of Americanists, held in Cambridge, 18-23 August 1952, 202-219. London: Royal Anthropological Institute.