[J]. Journal of Beijing Normal University(Natural Science), 2013, 49(z1): 285-291.
Citation: [J]. Journal of Beijing Normal University(Natural Science), 2013, 49(z1): 285-291.

  • (1)College of  Water  Sciences,Beijing  Normal  University,100875,Beijing,China;2)Beijing  Water  Science  and  Technology  Institute,100044,Beijing,China
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