1. Famine, desertification and vulnerable population: the case of Umm Ruwaba District, Kordofan region, Sudan;Khogali;Ambio,1991
2. Environmental security and its relation to Ethiopia and Sudan;Westing;Ambio,1991
3. The Horn of Africa: millions on the move;Refugees,1990
4. African famines: yet again;Economist,1991
5. Economic consequences of drought, crop failure and famine in Ethiopia, 1973–1986;Kiros;Ambio,1991