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  1. 1
    World energy needs and resources.

    World energy needs and resources.

    Published 1981
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  2. 2
    Appropriate technology for natural resources development /

    Appropriate technology for natural resources development / by Bulfin, Robert L.

    Published 1977
    Book
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  3. 3
    World energy needs and resources.

    World energy needs and resources.

    Published 1981
    Book
    Save to List
    Saved in:
  4. 4
    Appropriate technology for natural resources development /

    Appropriate technology for natural resources development / by Bulfin, Robert L.

    Published 1977
    Book
    Save to List
    Saved in:

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