Oversight, Public Law 96 479 National Materials and Minerals Policy, R. & D. Act of 1980 and consideration of H.R. 4281 Critical Materials Act of 1981 : hearings before the Subcommittee on Transportation, Aviation, and Materials and the Subcommittee on Science, Research, and Technology of the Committee on Science and Technology, U.S. House of Representatives, Ninety seventh Congress, second session, April 20, 22, 1982.

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