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  1. 1

    New evaluation procedures for a new generation of water-related projects od Cummings, Ronald

    Wydane 1996
    Książka

    New evaluation procedures for a new generation of water-related projects
  2. 2

    New evaluation procedures for a new generation of water-related projects od Cummings, Ronald G.

    Wydane 1996
    Książka

    New evaluation procedures for a new generation of water-related projects
  3. 3

    Valuing environmental goods an assessment of the contingent valuation method od Cummings, Ronald G.

    Wydane 1986
    Książka

    Valuing environmental goods an assessment of the contingent valuation method
  4. 4

    Water resource management in northern Mexico od Cummings, Ronald G.

    Wydane 1972
    Książka

    Water resource management in northern Mexico

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