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Dyfyniad Arddull ChicagoNational Research Council (U.S.). Panel on Renewable Energy resources, United States. Agency for International Development. Office of Science and Technology, and National Academy of Sciences (U.S.). Board on Science and Technology for International Development. Energy for Rural Development: Renewable Resources and Alternative Technologies for Developing Countries. Washington, D.C.: National Academy of Sciences, 1976.
Dyfyniad MLANational Research Council (U.S.). Panel on Renewable Energy resources, et al. Energy for Rural Development: Renewable Resources and Alternative Technologies for Developing Countries. National Academy of Sciences, 1976.