Coal; its history and uses
Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb. Green, A. H. Geology of coal.--Miall, L. C. Coal plants. Animals of the coal measures.--Thorpe. T. E. Chemistry of coal.--Rücker, A. W. Coal as a source of warmth and power.--Marshall A. The coal question
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