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Authors |
Year |
Title |
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Leonova |
1996 |
O sistematike permskikh ammonoidei semeistva Perrinitidae.
[On the Systematics of the Permian Ammonoid Family Perrinitidae.]
Paleontologicheskii Zhurnal, 1966 (2): 25-33, 6 text-figs., Moskva.
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Miller & Furnish |
1940c |
Permian ammonoids of the Guadalupe Mountain Region and adjacent areas.
Special Papers of the Geological Society of America, 26: 1-242, fig.1-59, pl.1-44; Baltimore.
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|
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Ruzhencev |
1950 |
Verkhnekamennougol'nye ammonity Urala.
Trudy Paleont. Inst., Akad. Nauk SSSR, 29: 1-220, fig.1-84, pl.1-15; Moskva.
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Tharalson |
1984 |
Revision of the Early Permian ammonoid family Perrinitidae.
Journal of Paleontology, 58 (3): 804-833, fig.1-24, 1tab.; Lawrence, Kansas.
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