Precipitation cycles in the middle and lower reaches of the Yellow River (1736?2000) |
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基金项目: | National Natural Science Foundation of China, No. 40331013; No.90502009; No. 40571007, No. 40701021 |
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摘 要: |
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收稿时间: | 2007-09-26 |
修稿时间: | 2007-11-20 |
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