Books dealing with the recent history of Ethiopia such as Greenfield's Ethiopia, a new political history, or Del Boca's The Ethiopian war, 1935–1941, state that a few works in Amharic have been written about this period. Though the number is not considerable, many books have been written on this subject, most of them by survivors of this conflict. Since they represent primary sources for the Ethiopian point of view, they are of great value, but there are several factors which complicate their utilization.