United Nations Conference on Trade and Development & United Nations Conference on Trade and Development. Special Committee on Preferences. (1974). Operation and effects of the generalized system of preferences. United Nations.

United Nations Conference on Trade and Development and United Nations Conference on Trade and Development. Special Committee on Preferences. Operation and Effects of the Generalized System of Preferences. New York: United Nations, 1974.

United Nations Conference on Trade and Development and United Nations Conference on Trade and Development. Special Committee on Preferences. Operation and Effects of the Generalized System of Preferences. United Nations, 1974.