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Working paper / Intern. monetary fund. WP/04/158 : Dimensions of land inequality and economic development / L.Erickson,D.Vollrath, 2004. - 23 p. - Текст : непосредственный.
Working paper / Intern. monetary fund. WP/07/83 : Land distribution and financial system development / D. Vollrath, L. Erickson, 2007. - 30 p. - Текст : непосредственный.