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Ashby, J.A. ,  [Small farmers` participation in the design of technologies : A "state of the art" review] ,  Small farmers` participation in the design of technologies : A "state of the art" review

Ashby, J.A. ,  [Participation of small farmers in technology assessment : Experiences with beans (Phaseolus vulgaris L.) and rock phosphate] ,  Participation of small farmers in technology assessment : Experiences with beans (Phaseolus vulgaris L.) and rock phosphate