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  1. 1

    World Resources 1990-91. A report by the World Resources Institute in collaboration with UNEPand UNDP.

    Argitaratua 1990
    Liburua

    World Resources 1990-91. A report by the World Resources Institute in collaboration with UNEPand UNDP.
  2. 2

    World resources 1987 an assessment of the resource base that support the global economy, eight data table for 146 countries.

    Argitaratua 1987
    Liburua

    World resources 1987 an assessment of the resource base that support the global economy, eight data table for 146 countries.

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