Petrographic constitution of the Meigs Creek No. 9 coal bed: an exploratory study of the petrographic constitution of the Meigs Creek (No. 9) bed coal of Ohio with introductory description of the prevailing methods of coal microscopy
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Publisher:Ohio. Division of Geological Survey
Series/Report no.:Ohio. Division of Geological Survey. Report of investigations. no. 27
Results of investigation accomplished under National Science Foundation, Grant no. G-385, 1953 to 1955.