![The Central Sudan; From Hausaland to Egypt, through the Sudan; Khont-Hon-Nofer. The Lands of Ethiopia; Nigeria and Its Tin Fields; Islam Lands;]()
The Central Sudan; From Hausaland to Egypt, through the Sudan; Khont-Hon-Nofer. The Lands of Ethiopia; Nigeria and Its Tin Fields; Islam Lands;C., F. R.; Kumm, H. Karl W.; Kumm, H. K. W.; Calvert, Albert F.; Shoemaker, Michael Myers · The Geographical Journal · 1911