Não informado. (2000). The Least developed countries. United Nations.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. The Least Developed Countries. Geneva, Suíça: United Nations, 2000.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. The Least Developed Countries. United Nations, 2000.
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