Yazar
Gerolf Weigel
5 cilt bulundu.
Cilt sonuçları
ICT4D, connecting people for a better world
Gerolf Weigel · Swiss Agency for Development and Cooperation, Global Knowledge Partnership
287 sayfa · 2004
Social aspects / Economic aspects / Economic development / Information technology
The soils of the Maybar/Wello area
Gerolf Weigel · University of Berne, Institute of Geography
174 sayfa · 1986
Agricultural development projects / Land capability for agriculture / Soil erosion / Soils / Agriculture
An agroecological development plan for the Maybar area, Wello Research Unit, Ethiopia
Gerolf Weigel · Soil Conservation Research Project
78 sayfa · 1986
Agricultural ecology / Land capability for agriculture / Soil conservation
The soils of the Maybar area, Wello Research Unit, Ethiopia
Gerolf Weigel · Soil Conservation Research Project
104 sayfa · 1986
Land capability for agriculture / Soil management / Soil surveys / Soils