1. American Water Works Association (1998). Standards methods for the examination of waste water (20th edn). Washington, DC: American Public Association. APHA–AWWA–WEF.
2. Bogoso Gold Limited (BGL) (2002). An overview of Bogoso Gold Limited. Ghana: BGL.
3. Coakley, G. J. (1996). The Mineral Industry in Ghana. Reston, VA: US Geological Survey.
4. Franblau, A., & Lillis, R. (1989). Acute arsenic intoxication from environmental arsenic exposure. Archives of Environmental Health, 44, 385–390.
5. Knight, & Scott (2002). Bogoso Gold Limited: Environmental impact assessment for Prestea north project, London: Knight and Scott, Winston, Inc.