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Google圖書搜尋
The Economic Value of Farm Manure as a Fertilizer on Iowa Soils
William Henry Stevenson
L. W. Forman
Percy Edgar Brown
出版
Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts
, 1926
URL
http://books.google.com.hk/books?id=5TUTAQAAIAAJ&hl=&source=gbs_api