Mahaney, W.C. (1990). Ice on the Equator. Ellison Bay, Wisconsin, U.S.A: Wm Caxton Ltd. ISBN0-940473-19-4. A full survey of the long glacial and periglacial reconstructive history of Mt. Kenya, its geological and environmental settings, sequences of paleosols (ancient soils) and their significance in understanding the multiplicity of glaciations.