Saya mau tau Uga delengen dari Wong Afar. Jelaskan dalam bahasa jawa

Mordechai Abir, The era of the princes: the challenge of Islam and the re-unification of the Christian empire, 1769-1855 (London: Longmans, 1968).

J. Spencer Trimingham, Islam in Ethiopia (Oxford: Geoffrey Cumberlege for the University Press, 1952).