Bibliography

Bibliography of Vitality:
Dimmendaal, Gerrit J. and F. K. Erhard Voeltz. 2007. "Africa." In Encyclopedia of the World's Endangered Languages, edited by Christopher Moseley. Routledge.
Bibliography of Locations:
Hammarström, Harald & Forkel, Robert & Haspelmath, Martin & Nordhoff, Sebastian. 2014.
Glottolog 2.3. Leipzig: Max Planck Institute for Evolutionary Anthropology. (Available online at http://glottolog.org)
Bibliography of Context:
Dimmendaal, Gerrit J. and F. K. Erhard Voeltz. 2007. "Africa." In Encyclopedia of the World's Endangered Languages, edited by Christopher Moseley. Routledge.