Pickerill RK, Forbes WB. Bifungites of Halli from the Ordovician (Caradocian) Trenton Limestone of the Quebec City Area. atlgeo [Internet]. 1977 Dec. 1 [cited 2024 Dec. 21];13(3). Available from: https://journals.lib.unb.ca/index.php/ag/article/view/1936