Coal resources of Indiana / by Frank Darwyn Spencer ; prepared in cooperation with the Indiana Department of Conservation Geological Survey

Author:: Spencer, Frank Darwyn, 1904-
Published:: Washington, D.C. : United States Department of the Interior, Geological Survey, 1953.
Physical Description:: 1 online resource (iv, 42 pages) : illustrations, maps
Additional Creators:: Geological Survey (U.S.) and Indiana. Geological Survey