Bibliography

Bibliography of Vitality:
Anonby, Stan, and David J. Holbrook. "A Survey of the languages of the Javari River Valley, Brazil." Summer Institute of Languages: SIL Electronic Survey Report. (2010).
Bibliography of Locations:
2005. "The World Atlas of Language Structures." edited by Bernard Comrie et al. Oxford University Press.
Bibliography of Context:
Crevels, Mily. 2012. "Language Endangerment in South America: The Clock Is Ticking." In The Indigenous Languages of South America: A Comprehensive Guide, edited by Hans Henrich Hock et al.. 167-234. Mouton de Gruyter.