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32027

Ton, Giel and Vellema, Sietze and DeRuyterDeWildt, Marieke (2011): Credible evidence on complex change processes: key challenges in impact evaluation on agricultural value chains.

33329

Ton, Giel (2008): Challenges for smallholder market access: a review of literature on institutional arrangements in collective marketing. Published in: Stewart Postharvest Review , Vol. 5, No. 2008 (1 October 2008): pp. 1-6.