Pickerill, R. K., L. R. Fyffe, and W. H. Forbes. “Late Ordovlcian-Early Silurian Trace Fossils from the Matapedia Group, Tobique River, Western New Brunswick”. Atlantic Geology 23, no. 2 (August 1, 1986). Accessed August 18, 2019. https://journals.lib.unb.ca/index.php/ag/article/view/1623.