Abd El-Aziz, D., & El Kafrawy, M. (1990). Comparison between pumps which work by solar energy electricity, and diesel. Arab republic of Egypt. The institute of National Planning.
Chicago-referens (17:e uppl.)Abd El-Aziz, Durria, och M. El Kafrawy. Comparison Between Pumps Which Work by Solar Energy Electricity, and Diesel. [Cairo]: Arab republic of Egypt. The institute of National Planning, 1990.
MLA-referens (9:e uppl.)Abd El-Aziz, Durria, och M. El Kafrawy. Comparison Between Pumps Which Work by Solar Energy Electricity, and Diesel. Arab republic of Egypt. The institute of National Planning, 1990.
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