Le système des classes nominales dans quelques languages (birom, ganawuri, anaguta, irigwe, kaje, rukuba) appartenant au groupe 'Plateau' (Nigéria central) de la sous-famille Bénoué-Congo
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