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Coal research hearings before the Subcommittee on Energy Development and Applications of the Committee on Science and Technology, U.S. House of Representatives, Ninety-seventh Congress, second session, May 18: June 21 ; August 23 ; September 16, 1982
- "Coal research hearings before the Subcommittee on Energy Development and Applications of the Committee on Science and Technology, U.S. House of Representatives, Ninety-seventh Congress, second session, May 18: June 21 ; August 23 ; September 16, 1982"@en
- "Coal research : hearings before the Subcommittee on Energy Development and Applications of the Committee on Science and Technology, U.S. House of Representatives, Ninety-seventh Congress, second session, May 18: June 21 ; August 23 ; September 16, 1982"@en