1. FAO: FAOSTAT. 2010, , ,
http//:faostat.fao.org
,
2. IITA: Cassava in Tropical Africa. a reference manual. International Institute of Tropical Agriculture (IITA). 1990, , Ibandan, Nigeria
3. FAO: Food and Agricultural Organization of the United Nations (FAO), State of Food Insecurity in World 2009. 2010, , FAO, Rome, 2010
4. FAO/WHO: Vitamin and mineral requirements in human nutrition. Report of a joint FAO/WHO expert consultation. 1998, , Bangkok, Thailand, 21–30 September
5. WHO: Micronutrient deficiencies: Iron deficiency anaemia. 2007, WHO, Geneva,
http://www.who.int/nutrition/topics/ida/en/
. Accessed 10 November 2011