Bibliography
Bibliography of Vitality:
Lewis, M. Paul (ed.). 2009. Ethnologue: Languages of the World, 16 edn. http://www.ethnologue.com/home.asp. (15 February, 2011.)
Bibliography of Locations:
Kay Williamson. 1973. "Benue-Congo Comparative Wordlist." II: University of Ibadan, Nigeria: West African Linguistic Society.
Bibliography of Context:
Lewis, M. Paul (ed.). 2009. Ethnologue: Languages of the World, 16 edn. http://www.ethnologue.com/home.asp. (15 February, 2011.)