Pennsylvanian-Age Cordaitalean Wood from Knoxville, Iowav. 90309–319
Nelson, W. John, DiMichele, William A., Wilson, Bob, Wilson, Doug, Lakeram, Scott R., and Elrick, Scott D. 2022. "Pennsylvanian-Age Cordaitalean Wood from Knoxville, Iowa." New Mexico Museum of Natural History and Science Bulletin, 90 309–319.