X1011625982-00237-63502</DOCNO> Our Hoosier State beneath us: Coal Coal Block coals Cannel coal Chemical properties of coal Coal balls: preservers of organisms that lived in ancient swamps Coal gasification: a source of clean energy Coal liquefaction Composition of coal Distribution of coal in Indiana History of coal mining in Indiana Low-sulphur coal Methane in coal Methods of mining coal Peacock coal Physical properties of coal Surface-mined land in Indiana Underground Coal Mining in Indiana
(organisms; lived; L:in ancient swamps; T:Coal gasification)
organisms
lived
L:in ancient swamps T:Coal gasification