Não informado. (1989). Proceedings of the World Bank Annual Conference on Development Economics. World Bank.
Chicago-referens (17:e uppl.)Não informado. Proceedings of the World Bank Annual Conference on Development Economics. Washington: World Bank, 1989.
MLA-referens (8:e uppl.)Não informado. Proceedings of the World Bank Annual Conference on Development Economics. World Bank, 1989.
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