found: Ruhlen:p. 305 (Kusaal)
found: Ethnologue, 1992:p. 269 (Africa, Ghana: Kusaal, Eastern; Kusale, Kusasi; Kusasi are the people, Kusaal is the language) p. 172 (Africa, Burkina Faso: Kusaal, Western; Kusale, Kusasi, Koussassé)
found: Briticanna.com website, June 23, 2006(Oti-Volta languages; the largest languages in the Oti-Volta group include Moore, the principal language of eastern Burkina Faso; Gurma; Gurenne; Dagbani, the principal language of northern Ghana; and Dagaari , spoken in northwestern Ghana; among the Grusi languages, Kabiye is widely spoken as a second language in northern Togo)
