Gen gu cang sang hua You Yan
Gen gu cang sang hua You Yan
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About This Book
本书以北京为中心, 辐射华北地区, 从地质历史, 社会发展的角度, 叙述了华北地区的发展, 演变, 描绘了这一地区的自然, 人文历史变化的概貌. 它是一本集科学知识, 历史常识为基本内容的科普读物.
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