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/

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

The language of the Modhupur Mandi (Garo) Vol I: Grammar ( pp. xii+406 ) . Burling, Robbins (2004) · New Delhi: Bibliophile South Asia, in association with Promilla & Co. Publishers http://hdl.handle.net/2027/spo.bbv9808.0001.001