Second meeting of the Eastern African Sub-Committee for Soil Correlation and Land Evaluation : Addis Ababa, Ethiopia, 25-30 October 1976
著者
書誌事項
Second meeting of the Eastern African Sub-Committee for Soil Correlation and Land Evaluation : Addis Ababa, Ethiopia, 25-30 October 1976
（World soil resources report, 47）
Food and Agriculture Organization of the United Nations, 1977