World Soil Resources Reports. (1991). Agro-ecological land resources assessment for agricultural development planning: A case study of kenya resources data base and land productivity. Rome: International Institute For Applied Systems Analysis.
استشهاد بنمط شيكاغوWorld Soil Resources Reports. Agro-ecological Land Resources Assessment for Agricultural Development Planning: A Case Study of Kenya Resources Data Base and Land Productivity. Rome: International Institute For Applied Systems Analysis, 1991.
MLA استشهادWorld Soil Resources Reports. Agro-ecological Land Resources Assessment for Agricultural Development Planning: A Case Study of Kenya Resources Data Base and Land Productivity. Rome: International Institute For Applied Systems Analysis, 1991.