%0 Generic %T Strategic minerals and materials policy hearings before the Subcommittee on Energy and Mineral Resources of the Committee on Energy and Natural Resources, United States Senate, Ninety-seventh Congress, first session, on the strategic minerals and materials policy of the United States, April 1, 7, and 9, 1981. %U https://ezaccess.libraries.psu.edu/login?url=http://congressional.proquest.com/congcomp/getdoc?HEARING-ID=HRG-1981-NAR-0013