खोज परिणाम - Jahnke, Hans E.

The impact of agricultural research in tropical Africa : a study of the collaboration between the international and national research systems / द्वारा Jahnke, Hans E.

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

अन्य लेखक: “…Jahnke, Hans E.…”