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  1. 1
    Environmental stress studies with reference to the pollution in the Vattakayal backwaters near the industrial area of Chavara, Kollam district, Kerala/
    由 Koshy P M
    出版 2013
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    Ph.D Thesis
  2. 2
    Economic and environmental dimensions of backwater resources in Kerala: a study with special reference to Kuttanad region/
    由 Jacob Chandy
    出版 2014
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    Ph.D Thesis
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