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  1. 1

    World phosphates supply to the year 2000 af Brown, Martin

    Udgivet 1988
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    World phosphates supply to the year 2000
  2. 2

    The role of phosphorus in agriculture

    Udgivet 1980
    Available for UP System via Wiley Online Library
    Electronic Resource

    The role of phosphorus in agriculture
  3. 3

    Nauru phosphate and political progress af Viviani, Nancy

    Udgivet 1970
    Bog

    Nauru phosphate and political progress

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