ProQuest U.S. Congressional Hearings Digital Collection.
ii, 48 pages ; cm
Focuses on potash mining development for fertilizer use. Considers (70) H.R. 496.
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Print version: United States. Congress. House. Committee on Mines and Mining. Potash. Microfiche version: United States. Congress. House. Committee on Mines and Mining. Potash. [Bethesda, Md.] : LexisNexis Academic & Library Solutions,