Kenya, geothermal activity of the Barrier volcanic complex and adjacent areas, 1:50 000: In: British Geological Survey Research Report SC/93/1 / geological mapping by Drs M.Smith and P.N.Dunkley compilation by Dr. M.Smith on base-map prepared from series Y633 1:100 000 and series Y731 1:50 000 topographic sheets and air photographsCartographic materials
