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Leitfaden Risikoanalyse bei den Zollkontrollen
Eurotoll : European research project for toll effects and pricing strategies
(1999)
Tariffs and growth : some illustrations from the world economy, 1850-1940
Capie, Forrest, (1994)
The effective rates of protection and the question of labor protection in the United States : a comment
Balassa, Béla A., (1970)
The macroeconomic consequences of investment liberalization for developing countries
Guisinger, Stephen E., (2000)