Relation of duties to value of imports. A comparison of the equivalent ad valorem of rates of duty in 1929 and in the period October, 1930, to September, 1931, on articles dutiable under both or either of the tariff acts of 1922 and 1930 ... Reprinted for the use of the United States Tariff Commission from Senate document, no. 91, Seventy-second Congress, first session.
- Tariff United States
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