Russel A. Peppers
1932
Correlation and palynology of coals in the Carbondale and Spoon formations (Pennsylvanian) of the northeastern part of the Illinois Basin
Distribution of boghead algae in Illinois Basin coal beds
Palynological correlation of major Pennsylvanian (Middle and Upper Carboniferous) chronostratigraphic boundaries in the Illinois and other coal basins
Palynology and petrography of a Middle Devonian coal in Illinois
Spores in strata of late Pennsylvanian cyclothems in the Illinois Basin
Correlation of the "Boskydell Sandstone" and other sandstones containing marine fossils in southern Illinois using palynology of adjacent coal beds