1. Watering point survey: Ngamiland cattle trek route;Aquatec,1982
2. Glossary of Geology;Bates,1987
3. Bureau de Recherches Geologique et Miniers, 1986. Maun water supply hydrogeological survey. Orleans, France, 86-BWA-022-EAU. 2 vols.
4. Hydrobiological studies in the Okavango Delta and the Kwando/Linyanti /Chobe River, Botswana. I Surface water quality analysis;Cronberg;Botswana Notes and Records,1995
5. The study of hydrological conditions in an experimental area in the seasonal swamp;Dincer,1976