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1. Colorado coal analyses, 1975 (analyses of 64 samples collected in 1975)
   Colorado Geological Survey
   TP326.U6 C59 1977
2. Costs of producing power in Iowa with Iowa coals, with a comparison of estimated costs and costs from actual tests
   Wagner, Herbert Walter, 1886-
   TP326.U6 I8 1912
3. Coal : research and development to support national energy policy
   National Research Council (U.S.). Committee on Coal Research, Technology, and Resource Assessments to Inform Energy Policy
   TP326.U6 N37 2007
4. Coal : energy for the future
   National Research Council (U.S.). Committee on the Strategic Assessment of the U.S. Department of Energy's Coal Program
   TP326.U6 N385 1995
5. Composition and by-product values of some West Virginia coals
   Hodge, W. W. (Willard Wellington), 1884-
   TP326.W5 H68