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Ruzhencev |
1951 |
Nizhnepermskie ammonity yuzhnogo Urala. 1.Ammonity Sakmarskogo Yarusa.
Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 33: 1-186, fig.1-62, phot.1-8, pl.1-15; Moskva.
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Teichert |
1942 |
Permian ammonoids from Western Australia.
Journal of Paleontology, 16 (2): 221-232, fig.1-7, pl.35; Tulsa,Oklahoma.
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