Pennsylvanian spores of Illinois and their use in correlation / by Robert M. Kosanke.
Kosanke, Robert M. (Robert Max)
Illinois State Geological Survey.
Urbana, Ill. :
State Geological Survey,
"Manuscript completed in August 1948."
Plant spores, Fossil
QE105 .A16 no.74
Bulletin (Illinois State Geological Survey) ; no. 74.