1. Shackleton RM: Geology of the country between Nanyuki and Maralal. 1946, Geological Survey of Kenya Repor, 11. Survey of Kenya, Nairobi
2. Dixey F: Geology of Northern Kenya. 1948, Geological Survey of Kenya, Report 15, Survey of Kenya, Nairobi
3. Dodson RG: Geology of the South Horr Area. 1963, Geological Survey of Kenya Report No. 60. Geological Survey of Kenya, Nairobi
4. Randel RP: Geology of the Laisamis Area. 1967, Government Printer, Nairobi
5. Baker BH: Geology of the Baragoi Area. 1960, Geological Survey of Kenya, Nairob