Bibliography

Bibliography of Vitality:
Lewis, M. Paul, Gary F. Simons, and Charles D. Fennig (eds.), 2013. Ethnologue: Languages of the World, 17th edition. Dallas, Texas: SIL International. Online version: http://www.ethnologue.com.
Bibliography of Locations:
2005. "The World Atlas of Language Structures." edited by Bernard Comrie et al. Oxford University Press.
Bibliography of Context:
George van Driem. 2007. "South Asia and the Middle East." In Encyclopedia of the World's Endangered Languages, edited by C. Moseley. 283-348. London & New York: Routledge.