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Only Mumuye and Yendang proper have more than about 5,000 speakers. Mumuye is the most widely spoken Adamawa language.
Further reading
Shimizu, Kiyoshi. 1979. A comparative study of the Mumuye dialects (Nigeria). (Marburger Studien zur Afrika- und Asienkunde A14). Berlin: Dietrich Reimer.
Footnotes
Güldemann, Tom (2018). "Historical linguistics and genealogical language classification in Africa". In Güldemann, Tom (ed.). The Languages and Linguistics of Africa. The World of Linguistics series. Vol. 11. Berlin: De Gruyter Mouton. pp. 58–444. doi:10.1515/9783110421668-002. ISBN978-3-11-042606-9.