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Lua i Stíl Chicago (17ú heag.)Lim-ao, Nuno, agus Anthony Venables. Infrastructure, Geographical Disadvantage and Transport Costs. Washington, D.C: Trade, Development Research Group, World Bank, 1999.
Lua MLA (9ú heag.)Lim-ao, Nuno, agus Anthony Venables. Infrastructure, Geographical Disadvantage and Transport Costs. Trade, Development Research Group, World Bank, 1999.
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