Fossil Vegetational Transect from Below the Colchester Coal to the Roof of the Cardiff (Survant) Coal (Desmoinesian, Upper Middle Pennsylvanian), Illinois Basinv. 94107–135
Calder, John H., Nelson, W. John, Bashforth, Arden R., Wittry, Jack, Elrick, Scott D., and DiMichele, William A. 2023. "Fossil Vegetational Transect from Below the Colchester Coal to the Roof of the Cardiff (Survant) Coal (Desmoinesian, Upper Middle Pennsylvanian), Illinois Basin." New Mexico Museum of Natural History and Science Bulletin, 94 107–135.