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  5. Doppler, Werner [Editor] ; Association for Farming Systems Research and Extension European Group, European Symposium on Rural and Farming Systems Analyses: Environmental Perspectives 3 1998 Hohenheim

    Rural and farming systems analyses: environmental perspectives : [proceedings of the Third European Symposium of the Association of Farming Systems Research and Extension in Hohenheim, Germany, March 25 to 27, 1998]

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    Weikersheim: Margraf, 1999

    Published in: Association for Farming Systems Research and Extension: Proceedings of the ... Symposium of the Association of Farming Systems Research and Extension ; 3

  6. Acquaye, D. K. [Editor] ; Crops Research Institute Nyankpala, Workshop on Improving Farming Systems in the Interior Savanna Zone of Ghana 1 1986 Nyankpala

    Improving farming systems in the interior savannah zone of Ghana : [proceedings of the first Workshop on Improving Farming Systems in the Interior Savanna Zone of Ghana held at Nyankpala, northern region, Ghana, 8 - 10th april, 1986]

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    Weikersheim: Margraf, 1992

    Published in: Nyankpala agricultural research report ; 8

  16. Bayliss-Smith, Timothy P. [Author]

    The ecology of agricultural systems

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    Cambridge [u.a.]: Cambridge Univ. Pr., 1982

    Published in: Cambridge topics in geography ; second series