J. D. Fage, Roland Anthony Oliver (1985) The Cambridge heritage of Africa, Vol. Lewis, I.M. (1999) A Pastoral Democracy: A Study of Pastoralism and Politics Among the Northern Somali of the Horn of Africa, LIT Verlag Münster, p. Lewis, Ioan M. (1994). Blood and Bone: The Call of Kinship in Somali Society. Contrary to his claims of fiscal well being and business acumen, Trump's tax returns from 1985 to 1994 clearly show net losses totaling $1.