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Fenton & Fenton |
1924 |
The stratigraphy and fauna of the Hackberry stage of Upper Devonian.
Contributions of the Michigan University, Museum of Geology, 1: 1-260, fig.1-9,pl.1-45; New York.
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Miller |
1938 |
Devonian ammonoids of America.
Special Papers, Geological Society of America, 14: 1-262, fig.1-41, pl.1-39; Baltimore.
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