胡海涛，罗国煜，许兵，等。黄河黑山峡河段大柳树坝址工程地质专题研究。
Han Wenfeng. Study on Important Engineering Geological Problems about Development of Heishan Gorge on the Yellow River. Beijing: Science Press, 2004.
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“忘记历史就意味着背叛。”许一兵说。
Xu thinks that forgetting history means betrayal.
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