PDF(207 KB)
PDF(207 KB)
PDF(207 KB)
改变黄河入海口,遏止渤海湾淤积——兼谈根治黄河下游水患问题
({{custom_author.role_cn}}), {{javascript:window.custom_author_cn_index++;}}To Change the Geographic Position of the Mouth of the Yel ow River,to Aviod Depositing in the Bohai Bay
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