Endangered Languages Catalogue Project. Compiled by research teams at University of Hawai'i Mānoa and Institute for Language Information and Technology (LINGUIST List) at Eastern Michigan University . (2012) ·

Ethnologue: Languages of the World, 16th Edition (2009) . (2009) · edited by M. Paul Lewis · SIL International http://www.ethnologue.com/

World Oral Literature Project . http://www.oralliterature.org

Atlas of the World’s Languages in Danger . Christopher Moseley (ed.) (2010) · UNESCO Publishing http://www.unesco.org/culture/en/endangeredlanguages/atlas

A Study on the Tibeto-Burman Languages of Uttar Pradesh . Suhnu Ram Sharma (2001) · New Research on Zhangzhung and Related Himalayan Languages · http://ir.minpaku.ac.jp/dspace/handle/10502/1327?mode=full&submit_simple=Show+full+item+record