Long-range Program for Minerals Industry: Hearings Before the Subcommittee on Minerals, Materials, and Fuels of the Committee on Interior and Insular Affairs, United States Senate, Eighty-fifth Congress, Second Session, on S. 2375, S. 3186, S. 3199, S. 3307, S. 3315, S. 3537, S. 3892, and S.J. Res. 16, Concerning the Mining and Minerals Industry