Howarth MK. Treatise Online no. 57: Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eodoceratoidea, Hildoceratoidea. TREON [Internet]. 2013 Jan. 24 [cited 2024 May 6];. Available from: https://journals.ku.edu/treatiseonline/article/view/4441