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  1. 1
    Land use constraints on wetland biomass development : a case study in Aitkin County, Minnesota /
    by Craig, William J.
    Published 1981
    Microform Book
  2. 2
    Production of wetland energy crops in Minnesota /
    Published 1981
    Microform Book
  3. 3
    Energy use and production : agriculture and coal mining /
    by Land, George W.
    Published 1981
    Microform Book
  4. 4
    Conflict between fuel and food : the ethical dimension /
    by Kenney, V. Paul
    Published 1981
    Microform Book
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