Arkell WJ, Moore RC, Miller AK, Furnish WM, Schindewolf OH. Part L, Mollusca 4, ch. 1, p. 1-129. InvertebratePaleo [Internet]. 1957 Jan. 1 [cited 2024 Nov. 21];. Available from: https://journals.ku.edu/InvertebratePaleo/article/view/5264