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  1. 1

    International Working group on Project 5 ecological effects on human activities on the value and resources of lake, marshes, rivers, deltas, estuaries and coastal zones, Paris, 13-...

    Được phát hành 1975
    Sách

    International Working group on Project 5 ecological effects on human activities on the value and resources of lake, marshes, rivers, deltas, estuaries and coastal zones, Paris, 13-17 MY, 1974 ; final report. Programme on Man and the Biosphere, United Nations \educational, Scientifc and Cuyltural Organization.
  2. 2

    Pollution ecology of freshwater in invertebrates Bằng Hart, C. W.

    Được phát hành 1974
    Sách

    Pollution ecology of freshwater in invertebrates
  3. 3

    An ecological study of a freshwater ecosystem [microform] Bằng Altarejos, Josefina A.

    Được phát hành 1974
    Visual Material

    An ecological study of a freshwater ecosystem [microform]

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