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) ·

Field trip to record the status of some little-known Nigerian languages ( pp. 11-14 ) . Roger Blench (1999) · Ogmios Newsletter. http://www.ogmios.org/ogmios/Ogmios_011.pdf

Africa ( ch. 7 ) . Gerrit J. Dimmendaal and F. K. Erhard Voeltz (2007) · In Encyclopedia of the World's Endangered Languages edited by Christopher Moseley · Routledge

A survey on language death in Africa ( pp. 402 ) . Sommer, Gabriele (1992) · In Language death: factual and theoretical explorations with special reference to East Africa Contributions to the sociology of language, #64 · edited by Brenzinger, Matthias · Mouton de Gruyter

An Atlas of Nigerian Languages . Roger Blench (2011) · Mallam Dendo http://www.rogerblench.info/Language/Africa/Nigeria/Atlas%%20of%%20Nigerian%%20Languages-%%20ed%%20III.pdf

Benue-Congo Comparative Wordlist . Kay Williamson (1973) · University of Ibadan, Nigeria: West African Linguistic Society

The Hasha Language of Central Nigeria and its Affinities . Roger Blench (2006) ·

Plateau field trips 1998-1999 ( pp. (?) ) . Blench, Roger M. (1999) · Ogmios. 11