Tariff treatment of wool and mica. Hearings before... Eighty fourth Congress, Second Session, on H.R. 6299 a bill to amend the Tariff Act of 1930 as it relates to unmanufactured mica and mica films and splittings, H.R. 12227 a bill to amend certain provisions of the Tariff Act of 1930 relative to import duties on wool. December 15 and 17, 1956.

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