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| Relationship of frequent disasters with geomagnetic weakening |
| YANG Dong-Hong-1, 2, YANG Xua-Xiang-2 |
| 1．Research Center of Palaeontology & Stratigraphy，Jilin University，Changchun 130026，China； 2．Key-Lab for Evolution of Past Life and Enviroment in Northeast Asia，Ministry of Eduation China， Jilin University，Changchun 130026，China； 3．College of Geoexploration Science and Technology，Jilin University，Changchun 130026，China |
| Received null Revised null Online 2011-09-25 |
| Reference |
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