Benefits of selected land management practices on ecosystem services: case studies in four watersheds of Ethiopia
Genetic resources of cruciferous crops: IBPGR Secretariat Consultation on the Genetic Resources of Cruciferous Crops, Rome, 17-19 November 1980
Crop genetic resources - the conservation of difficult material: Proceedings of an international workshop, 8-11 September 1980, University of Reading, U.K.