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Tariff protection in industrial countries, an evaluation
Balassa, Bela A., (1965)
Hearings before the Committee on Ways and Means, House of Representatives, 84th Congress, 2nd Session on H.R. 5550
(1956)
G.A.T.T. : an analysis and appraisal of the General Agreement on Tariffs and Trade
Clayton, William L., (1955)