Showing 1 - 2 results of 2 for search 'Ruthenberg, Hans', query time: 0.01s Refine Results
  1. 1
    Innovation policy for small farmers in the tropics the economics of technical innovation for agricultural development
    by Ruthenberg,Hans
    Published 1985
    Printed Book
  2. 2
    Farming systems in the tropics
    by Ruthenberg, Hans
    Published 1976
    Printed Book
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