Yochelson E.L. (1958). Some Lower Ordovician monoplacophoran mollusks from Missouri. <em>Journal of the Washington Academy of Sciences.</em> 48(1): 8-14., available online athttps://www.biodiversitylibrary.org/page/39744180 page(s): 8 [details] Available for editors [request]
original descriptionYochelson E.L. (1958). Some Lower Ordovician monoplacophoran mollusks from Missouri. <em>Journal of the Washington Academy of Sciences.</em> 48(1): 8-14., available online athttps://www.biodiversitylibrary.org/page/39744180 page(s): 8 [details] Available for editors [request]