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Deep seabed hard minerals hearing before the Committee on Foreign Relations, United States Senate, first session, Ninety-sixth Congress, on S. 493 ... June 13, 1979
- "Deep seabed hard minerals : hearing before the Committee on Foreign Relations, United States Senate, first session, Ninety-sixth Congress, on S. 493 ... June 13, 1979"
- "Deep seabed hard minerals hearing before the Committee on Foreign Relations, United States Senate, first session, Ninety-sixth Congress, on S. 493 ... June 13, 1979"@en