Tungsten Ores

Hearings Before the Committee on Finance, United States Senate, Sixty-sixth Congress, First Session, on H.R. 4437, a Bill to Provide Revenue for the Government and to Promote the Production of Tungsten Ores and Manufacture Thereof in the United States, November 10 and 11, 1919 [January 23, 1920. Part 1-2]

by United States. Congress. Senate. Committee on Finance