- M. DRAKECHJOSEPHMIGAI. ""The Conservation of Indigenous Forests: Towards Sustainable community Based Management of the Kaya's", dissertation submitted to the University of Nairobi in partial fulfilment of the requirements for the award of the LL.B degree.". In: Law Journal, Vol.2,. Departmental seminar; 1995.
This book describes four types of indigenous water retention structures used in East Africa. These structures are the Berkad tank, the Charco dam, sand wiers and hillside water retention ditches.