Mostrar 1 - 3 resultats de 3 per cerca 'Ruthenberg, Hans', hora de la petició: 0.01sec Refinar resultats
  1. 1

    Innovation policy for small farmers in the tropics the economics of technical innovations for agricultural development per Ruthenberg, Hans

    Publicat 1985
    Llibre

    Innovation policy for small farmers in the tropics the economics of technical innovations for agricultural development
  2. 2

    Farming systems in the tropics per Ruthenberg, Hans

    Publicat 1976
    Llibre

    Farming systems in the tropics
  3. 3

    Agricultural development in Tanganyika per Ruthenberg, Hans

    Publicat 1964
    Llibre

    Agricultural development in Tanganyika

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