An edition of Middle and Late Pennsylvanian strata on margin of Illinois Basin (1980)

Middle and Late Pennsylvanian strata on margin of Illinois Basin

Vermilion County, Illinois, Vermillion and Parke counties, Indiana : Tenth Annual Field Conference, Great Lakes Section, Society of Economic Paleontologists and Mineralogists, Danville, 26-28 September, 1980

By Society of Economic Paleontologists and Mineralogists. Great Lakes Section. Field Conference