Subsurface geology and coal resources of the Pennsylvanian system in Sangamon, Macon, Menard, and parts of Christian and Logan Counties, Illinois
By: [by] Kenneth E. Clegg.
Series: Illinois.  State Geological Survey.  Circular 312
Publisher: Illinois State Geological Survey
Published: 1961
Place of publication: Urbana
Language: eng
Number of pages: 28
Subjects: Geology, Stratigraphic -- Pennsylvanian.; Coal -- Geology -- Illinois.
Notes: Bibliography: p. 27-28.
Part of illustrative matter in pocket.