1. World health organization: The prevention and control of schistosomiasis and soil transmitted Helminthiasis. 2002, Geneva: WHO
2. World health organization: Weekly epidemiologic record. 2006, 81,145-164
http://www.who.int/wer/8116.pdf.accessed
12/11/2012
3. Davis A, Cook C, Zumla A: Schistosomiasis: Manson’s Tropical Diseases. 2003, London: Elsevier Science, 1431-1469. 21
4. WHO Expert Committee: Prevention and Control of Schistosomiasis and Soil-Transmitted Helminthiasis. Technical Report Series. 2002, Geneva: WHO
5. Kumie A, Ali A: An overview of environmental health status in Ethiopia with particular emphasis to its organization, drinking water and sanitation: a literature survey. Ethiop J Health Dev. 2005, 19 (2): 89-103.