8451National coal policy study8452Repealed. Pub. L. 97–375, title I, § 106(d), Dec. 21, 1982, 96 Stat. 1820Repealed8453Impact on employees8454Study of compliance problem of small electric utility systems8455Repealed. Pub. L. 104–66, title II, § 2021(j)(1), Dec. 21, 1995, 109 Stat. 727Repealed8456Socioeconomic impacts of increased coal production and other energy development8457Use of petroleum and natural gas in combustors