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Official standard grades for flue-cured tobacco (U.S. types 11, 12, 13, 14, and foreign type 92) : effective March 27, 1989 (54.F.R. 7925)
- "U.S. types 11, 12, 13, 14, and foreign type 92"@en
- "Official standard grades for flue-cured tobacco (U.S. types 11, 12, 13, 14, and foreign type 92) : effective March 27, 1989 (54.F.R. 7925)"@en