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Authors |
Year |
Title |
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Ruzhencev & Bogoslovskaya |
1978 |
Namyurskiy etap v evolyutsii ammonodey. Pozdnenamyurskiye ammonoidei.
Trudy Paleontologicheskogo Instituta Akademiya Nauk SSSR, 167: 1-336, fig.1-108, pl.1-44; Moskva.
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|
|
Yang, Zheng & Liu |
1983 |
Carboniferous ammonoid zones from Zhongning and Zhongwei, Ningxia Region, China.
Earth Science - Journal of Wuhan College of Geology, 20 (2): 9-23, tab.1-3, pl.1; Wuhan.
|
|
|
Yang |
1987 |
Early late Carboniferous ammonoids from Zhongwei, Ningxia Autonomous Region, China. [In Chinese, with English summary].
Geoscience, 1 (2): 157-172, 20 figs., 3 pls.
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