Não informado. (1989). Proceedings of the World Bank Annual Conference on Development Economics. World Bank.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Proceedings of the World Bank Annual Conference on Development Economics. Washington: World Bank, 1989.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Proceedings of the World Bank Annual Conference on Development Economics. World Bank, 1989.
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