Non fuel minerals policy review : oversight hearings before the subcommittee on mines and mining of the committee on interior and insular affairs : hearings held in Washington, D.C. April 9, May 8, June 12, July 10, and August 2, 1979.
United States.Congress.House.Committee on Interior and Insular Affairs.
Washington : U.S. Congress,
1979.
"Serial no.96-9."