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Biogas generation from animal and agricultural wastes in Africa
“El-Halwagi, Mohamed Mokhtar; Daiem, Adel abdel; United Nations. Economic Commission for Africa; National Research Centre (1980-12). Biogas generation from animal and agricultural wastes in Africa. UN. ECA Regional Preparatory Meeting on New and Renewable Sources of Energy (1981, Jan. 12 - 16 : Addis Ababa, Ethiopia). Addis Ababa :. © UN. ECA,. http://hdl.handle.net/10855/7795”