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Miller & Furnish |
1957a |
Permian ammonoids from Tunisia.
Journal of Paleontology, 31 (4): 705-712, fig.1-4, pl.83; Tulsa,Oklahoma.
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Spinosa, Furnish & Glenister |
1975 |
The Xenodiscidae, Permian ceratitoid ammonoids.
Journal of Paleontology, 49 (2): 239-283, fig.1-22, tab.1-5, pl.1-8.
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