Miller, A. K.; Garner, H. (1953). Lower Mississippian cephalopods of Michigan. Part II. Coiled nautiloids. Contributions from the Museum of Paleontology. 11 (6): 111–151.
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Miller, A. K.; Garner, H.
1953
Lower Mississippian cephalopods of Michigan. Part II. Coiled nautiloids