Title: Subsurface geology and coal resources of the Pennsylvanian system in Sangamon, Macon, Menard, and parts of Christian and Logan Counties, Illinois
First published: 1961
Subjects: Coal, Geology, Geology, Stratigraphic, Stratigraphic Geology
Places: Illinois
Time periods: Pennsylvanian
LC classification: QE105 .A45 no. 312