[1]ZHONG Yanxia,QU Xiangning.Problems of Water Environment and Their Protective Measures in the Sand Lake Tourist Area of Ningxia[J].Research of Soil and Water Conservation,2002,9(03):199-200.
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Problems of Water Environment and Their Protective Measures in the Sand Lake Tourist Area of Ningxia

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[1]宁夏回族自治区环境保护研究所, 宁夏沙湖自然保护区管理局.宁夏沙湖自然保护区综合考察报告[R].1999, 3-4.
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