Mcllroy D, Lang HF. Discovery and paleoenvironmental implications of a Zoophycos-group trace fossil (?Echinospira) from the Middle Pennsylvanian Sydney Mines Formation of Nova Scotia. atlgeo [Internet]. 2006 Apr. 1 [cited 2024 May 6];42(1). Available from: https://journals.lib.unb.ca/index.php/ag/article/view/2154