Getty, Patrick R., Robert Sproule, Matthew R. Stimson, and Paul C. Lyons. “Invertebrate Trace Fossils from the Pennsylvanian Rhode Island Formation of Massachusetts, USA”. Atlantic Geoscience 53 (April 27, 2017): 185–206. Accessed December 8, 2024. https://journals.lib.unb.ca/index.php/ag/article/view/25303.