Projeto de Idiomas em Risco de Extinção

	2012	Personal Communication on sign languages					James Woodward	James Woodward. 2012. "Personal Communication on sign languages."		12,800	10000-99999	(1986)	Vulnerable (20 percent certain, based on the evidence available)	Sri Lanka	Throughout Sri Lanka
		Glottolog				http://www.glottolog.org/glottolog/		"Glottolog." Online: http://www.glottolog.org/glottolog/.								7.11, 79.86
16	2009	Ethnologue: Languages of the World, 16th Edition (2009)	M. Paul Lewis	SIL International	Dallas, TX	http://www.ethnologue.com/		Lewis, M. Paul (ed.). 2009. Ethnologue: Languages of the World, 16 edn. http://www.ethnologue.com/home.asp. (15 February, 2011.)	ll_pub		10000-99999	12,800 deaf persons (Van Cleve 1986)	Vulnerable (20 percent certain, based on the evidence available)

Sri Lankan Sign Language