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| The flora from Zhaogou Formation in Shiguai Basin， Inner Mongolia and the geological age |
| GE Yu-Hui-1, SUN Chun-Lin-2, WANG Yu-Fen-3 |
| 1. School of Resources and Enviroment，Southwest Petroleum University，Chengdu 610500，China; 2. Research Center of Palaeontology and Straigraphy，Jilin University，Changchun 130026，China; 3. Geologic Science Institute of Jilin Province，Changchun 130012，China |
| Received null Revised null Online 2010-06-25 |
| Reference |
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