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Miller & Garner |
1955 |
Lower Mississippian cephalopods of Michigan. Part III. Ammonoids and summary.
Contributions, Museum of Paleontology. Univ. Michigan, 12: 113-173, fig.1-16, pl.1-7; Michigan.
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|
Weyer |
1972 |
Zum Alter der Ammonoideen-Faunen des Marshall-Sandsteins (Unterkarbon; Michigan, USA).
Berichte der deutschen Gesellschaft der geologischen Wissenschaften, A, Geol. Paläont., 17 (3): 325-350, 1 fig., 1 tab.; Berlin.
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