H. Ruthenberg

Farming systems in the tropics

H. Ruthenberg, 1973 .

Agricultural development in Tanganyika

H. Ruthenberg, 1964 .

Smallholder farming and smallholder development in Tanzania.

H. Ruthenberg, 1968 .

Innovation Policy for Small Farmers in the Tropics: The Economics of Technical Innovations for Agricultural Development

H. Jahnke, H. Ruthenberg, 1985 .