Não informado. (1977). Government Finance Statistics Yearbook. International Monetary Fund.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Government Finance Statistics Yearbook. Washington: International Monetary Fund, 1977.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Government Finance Statistics Yearbook. International Monetary Fund, 1977.
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