Subsurface geology and coal resources of the Pennsylvanian system in Crawford and Lawrence Counties, Illinois
Series: Illinois. State Geological Survey. Report of investigations -- 193; Report of investigations (Illinois State Geological Survey) -- no. 193.
Published: 1956
Place of publication: Urbana
Language: eng
Number of pages: 17
Subjects: Geology; Coal; Stratigraphic Geology
Notes: Bibliography: p. 17.