Title: Subsurface geology and coal resources of the Pennsylvanian system in De Witt, McLean, and Piatt Counties, Illinois
First published: 1972
Subjects: Coal, Geology, Geology, Stratigraphic, Stratigraphic Geology
Places: Illinois
Time periods: Pennsylvanian
LC classification: QE105 .A45 no. 473, QE673 .A45 no. 473