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Carbon and nitrogen isotopes analysis and sources of organic matter in the upper reaches of the Chaobai River near Beijing,China
Authors:LU FengYun  LIU ZhuQing  & JI HongBing
Institution:1,3* 1 Key Laboratory of Metropolitan Eco-Environment Processes,College of Resource Environment and Tourism,Capital Normal University,Beijing 100048,China;2 College of Water Conservancy & Civil Engineering,China Agricultural University,Beijing 100083,China;3 The State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China
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