United Nations. Department of Economic and Social Conditions. (1992). The direct conversion of Solar Energy to Electricity ; Department of economic and social development. United Nations.
Παραπομπή σε μορφή Chicago (17η εκδ.)United Nations. Department of Economic and Social Conditions. The Direct Conversion of Solar Energy to Electricity ; Department of Economic and Social Development. New York: United Nations, 1992.
Παραπομπή σε μορφή MLA (8th εκδ.)United Nations. Department of Economic and Social Conditions. The Direct Conversion of Solar Energy to Electricity ; Department of Economic and Social Development. United Nations, 1992.
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