Bibliography

Bibliography of Vitality:
Lewis, M. Paul (ed.). 2009. Ethnologue: Languages of the World, 16 edn. http://www.ethnologue.com/home.asp. (15 February, 2011.)
Bibliography of Locations:
2005. "The World Atlas of Language Structures." edited by Bernard Comrie et al. Oxford University Press.
Bibliography of Context:
Crevels, Mily. 2007. "South America." In Atlas of the World's Endangered Languages, edited by C. Moseley. 103-196. London & New York: Routledge.