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Google圖書搜尋
Soil Conservation Pays Off
Elmer Louis Sauer
Harold Clayton M. Case
其他書名
Results of Ten Years of Conservation Farming in Illinois
出版
University of Illinois Agricultural Experiment Station
, 1954
URL
http://books.google.com.hk/books?id=zk8TAQAAIAAJ&hl=&source=gbs_api